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v3.3.1.900

Real Estate and Accumulated Depreciation (Details) | 12 Months Ended |  |  |
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Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($)
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |
Furniture, fixtures and equipment |  | $ 1,207,098,000 | $ 1,365,276,000 |  |
Land And Depreciable Property Net |  | 17,000,000,000 | 16,700,000,000 |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Accumulated Depreciation |  | $ (6,084,616,000) | $ (5,432,805,000) | $ (4,807,709,000) | $ (4,912,221,000)
Partially Owned Properties |  | 394 |  |  |
Number of Units in Real Estate Property |  | 109,652 |  |  |
Partially Owned Unconsolidated Units |  | 1,281 |  |  |
Military Housing Properties |  | 2 |  |  |
Military Housing Units |  | 5,139 |  |  |
100 K Street [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 15,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,409,415 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 3,409,415 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 19,009,415 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 19,009,415 |  |  |
Encumbrances |  | $ 0 |  |  |
170 Amsterdam [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 236 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 111,609,104 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,648 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 111,612,752 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 111,612,752 |  |  |
Accumulated Depreciation |  | (2,550,383) |  |  |
Investment in Real Estate Net |  | 109,062,369 |  |  |
Encumbrances |  | $ 0 |  |  |
175 Kent [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 113 |  |  |
Initial Cost to Company, Land |  | $ 22,037,831 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 53,962,169 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,187,580 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,037,831 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 55,149,749 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 77,187,580 |  |  |
Accumulated Depreciation |  | (10,449,629) |  |  |
Investment in Real Estate Net |  | 66,737,951 |  |  |
Encumbrances |  | $ 0 |  |  |
180 Montague (fka Brooklyn Heights) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 193 |  |  |
Initial Cost to Company, Land |  | $ 32,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 92,675,228 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,964,453 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 32,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 94,639,681 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 127,039,681 |  |  |
Accumulated Depreciation |  | (13,281,633) |  |  |
Investment in Real Estate Net |  | 113,758,048 |  |  |
Encumbrances |  | $ 0 |  |  |
1111 Belle Pre (fka The Madison) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 360 |  |  |
Initial Cost to Company, Land |  | $ 18,937,702 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 92,822,313 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 109,202 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,937,702 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 92,931,515 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 111,869,217 |  |  |
Accumulated Depreciation |  | (8,083,006) |  |  |
Investment in Real Estate Net |  | 103,786,211 |  |  |
Encumbrances |  | $ 0 |  |  |
1210 Mass [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 144 |  |  |
Initial Cost to Company, Land |  | $ 9,213,512 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 36,559,189 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,158,827 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,213,512 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,718,016 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 46,931,528 |  |  |
Accumulated Depreciation |  | (14,010,670) |  |  |
Investment in Real Estate Net |  | 32,920,858 |  |  |
Encumbrances |  | $ 0 |  |  |
1401 E Madison [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 10,394,673 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 2,735,646 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,394,673 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 2,735,646 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 13,130,319 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 13,130,319 |  |  |
Encumbrances |  | $ 0 |  |  |
1500 Mass Ave [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 556 |  |  |
Initial Cost to Company, Land |  | $ 54,638,298 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,361,702 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 13,920,874 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 54,638,298 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 54,282,576 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 108,920,874 |  |  |
Accumulated Depreciation |  | (18,412,591) |  |  |
Investment in Real Estate Net |  | 90,508,283 |  |  |
Encumbrances |  | $ 0 |  |  |
1800 Oak (fka Rosslyn) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 314 |  |  |
Initial Cost to Company, Land |  | $ 31,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 109,005,734 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,461,258 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 31,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 111,466,992 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 142,866,992 |  |  |
Accumulated Depreciation |  | (15,629,471) |  |  |
Investment in Real Estate Net |  | 127,237,521 |  |  |
Encumbrances |  | $ 0 |  |  |
200 N Lemon Street [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Anaheim, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 5,865,235 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,722,655 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,865,235 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 3,722,655 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 9,587,890 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 9,587,890 |  |  |
Encumbrances |  | $ 0 |  |  |
204-206 Pine Street/1610 2nd Avenue [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 22,323,720 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 73,357,643 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,323,720 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 73,357,643 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 95,681,363 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 95,681,363 |  |  |
Encumbrances |  | $ 0 |  |  |
2201 Pershing Drive [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 188 |  |  |
Initial Cost to Company, Land |  | $ 11,321,198 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 49,674,175 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,036,904 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,321,198 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 51,711,079 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 63,032,277 |  |  |
Accumulated Depreciation |  | (7,033,954) |  |  |
Investment in Real Estate Net |  | 55,998,323 |  |  |
Encumbrances |  | $ 0 |  |  |
2201 Wilson [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 219 |  |  |
Initial Cost to Company, Land |  | $ 21,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 78,724,663 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,495,753 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 21,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 80,220,416 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 102,120,416 |  |  |
Accumulated Depreciation |  | (11,064,780) |  |  |
Investment in Real Estate Net |  | 91,055,636 |  |  |
Encumbrances |  | $ 0 |  |  |
2400 M St [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 359 |  |  |
Initial Cost to Company, Land |  | $ 30,006,593 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 114,013,785 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,650,345 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 30,006,593 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 117,664,130 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 147,670,723 |  |  |
Accumulated Depreciation |  | (41,374,875) |  |  |
Investment in Real Estate Net |  | 106,295,848 |  |  |
Encumbrances |  | $ 0 |  |  |
315 on A [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 202 |  |  |
Initial Cost to Company, Land |  | $ 14,450,070 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 115,824,930 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 169,215 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,450,070 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 115,994,145 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 130,444,215 |  |  |
Accumulated Depreciation |  | (6,171,735) |  |  |
Investment in Real Estate Net |  | 124,272,480 |  |  |
Encumbrances |  | $ 0 |  |  |
340 Fremont [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 42,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 176,850,680 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 42,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 176,850,680 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 218,850,680 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 218,850,680 |  |  |
Encumbrances |  | $ 0 |  |  |
45 Worthington [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 1,648,869 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 1,648,869 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 1,648,869 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 1,648,869 |  |  |
Encumbrances |  | $ 0 |  |  |
Four Hundred And Twenty East Eightieth Street [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 155 |  |  |
Initial Cost to Company, Land |  | $ 39,277,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,026,984 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,002,776 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 39,277,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 27,029,760 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 66,306,760 |  |  |
Accumulated Depreciation |  | (11,554,868) |  |  |
Investment in Real Estate Net |  | 54,751,892 |  |  |
Encumbrances |  | $ 0 |  |  |
425 Mass [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 559 |  |  |
Initial Cost to Company, Land |  | $ 28,150,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 138,600,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,574,977 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 28,150,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 142,174,977 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 170,324,977 |  |  |
Accumulated Depreciation |  | (34,957,838) |  |  |
Investment in Real Estate Net |  | 135,367,139 |  |  |
Encumbrances |  | $ 0 |  |  |
455 I Street [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 12,762,857 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,214,611 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,762,857 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 16,214,611 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 28,977,468 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 28,977,468 |  |  |
Encumbrances |  | $ 0 |  |  |
4885 Edgemoor Lane [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bethesda, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 875,185 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 875,185 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 875,185 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 875,185 |  |  |
Encumbrances |  | $ 0 |  |  |
4th and Hill [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 13,131,456 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 5,642,930 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,131,456 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 5,642,930 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 18,774,386 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 18,774,386 |  |  |
Encumbrances |  | $ 0 |  |  |
600 Washington [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 135 |  |  |
Initial Cost to Company, Land |  | $ 32,852,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 43,140,551 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 580,906 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 32,852,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 43,721,457 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 76,573,457 |  |  |
Accumulated Depreciation |  | (16,469,799) |  |  |
Investment in Real Estate Net |  | 60,103,658 |  |  |
Encumbrances |  | $ 0 |  |  |
660 Washington [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 420 |  |  |
Initial Cost to Company, Land |  | $ 106,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 166,311,679 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,378,724 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 106,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 167,690,403 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 273,790,403 |  |  |
Accumulated Depreciation |  | (23,978,444) |  |  |
Investment in Real Estate Net |  | 249,811,959 |  |  |
Encumbrances |  | $ 0 |  |  |
70 Greene [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 480 |  |  |
Initial Cost to Company, Land |  | $ 28,108,899 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 236,763,553 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 838,875 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 28,108,899 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 237,602,428 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 265,711,327 |  |  |
Accumulated Depreciation |  | (50,058,634) |  |  |
Investment in Real Estate Net |  | 215,652,693 |  |  |
Encumbrances |  | $ 0 |  |  |
71 Broadway [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 238 |  |  |
Initial Cost to Company, Land |  | $ 22,611,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 77,492,171 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 12,183,139 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,611,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 89,675,310 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 112,286,910 |  |  |
Accumulated Depreciation |  | (35,917,280) |  |  |
Investment in Real Estate Net |  | 76,369,630 |  |  |
Encumbrances |  | $ 0 |  |  |
77 Bluxome [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 102 |  |  |
Initial Cost to Company, Land |  | $ 5,249,124 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,609,876 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 175,686 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,249,124 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,785,562 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 24,034,686 |  |  |
Accumulated Depreciation |  | (3,551,433) |  |  |
Investment in Real Estate Net |  | 20,483,253 |  |  |
Encumbrances |  | $ 0 |  |  |
777 Sixth [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 294 |  |  |
Initial Cost to Company, Land |  | $ 65,352,706 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 65,747,294 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,708,867 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 65,352,706 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 67,456,161 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 132,808,867 |  |  |
Accumulated Depreciation |  | (22,000,130) |  |  |
Investment in Real Estate Net |  | 110,808,737 |  |  |
Encumbrances |  | $ 0 |  |  |
88 Hillside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Daly City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 95 |  |  |
Initial Cost to Company, Land |  | $ 7,786,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 31,587,325 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,740,889 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,786,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,328,214 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 41,115,014 |  |  |
Accumulated Depreciation |  | (5,965,778) |  |  |
Investment in Real Estate Net |  | 35,149,236 |  |  |
Encumbrances |  | $ 0 |  |  |
855 Brannan [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 41,363,921 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 59,118,300 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 41,363,921 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 59,118,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 100,482,221 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 100,482,221 |  |  |
Encumbrances |  | $ 0 |  |  |
Abington Glen [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Abington, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 90 |  |  |
Initial Cost to Company, Land |  | $ 553,105 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,697,396 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,707,619 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 553,105 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,405,015 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 6,958,120 |  |  |
Accumulated Depreciation |  | (4,378,376) |  |  |
Investment in Real Estate Net |  | 2,579,744 |  |  |
Encumbrances |  | $ 0 |  |  |
Alban Towers [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 229 |  |  |
Initial Cost to Company, Land |  | $ 18,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 89,794,201 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 646,083 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 90,440,284 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 109,340,284 |  |  |
Accumulated Depreciation |  | (12,554,736) |  |  |
Investment in Real Estate Net |  | 96,785,548 |  |  |
Encumbrances |  | $ 0 |  |  |
Altitude [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 43,783,485 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 110,209,151 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 43,783,485 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 110,209,151 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 153,992,636 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 153,992,636 |  |  |
Encumbrances |  | $ 0 |  |  |
Alton, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 11,049,027 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 64,366,946 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,049,027 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 64,366,946 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 75,415,973 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 75,415,973 |  |  |
Encumbrances |  | $ 0 |  |  |
Arbor Terrace [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Sunnyvale, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 175 |  |  |
Initial Cost to Company, Land |  | $ 9,057,300 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,483,642 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,639,125 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,057,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,122,767 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,180,067 |  |  |
Accumulated Depreciation |  | (13,158,508) |  |  |
Investment in Real Estate Net |  | 17,021,559 |  |  |
Encumbrances |  | $ 0 |  |  |
Arboretum (MA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Canton, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 156 |  |  |
Initial Cost to Company, Land |  | $ 4,685,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 10,992,751 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,207,099 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,685,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,199,850 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 19,885,750 |  |  |
Accumulated Depreciation |  | (8,869,308) |  |  |
Investment in Real Estate Net |  | 11,016,442 |  |  |
Encumbrances |  | $ 0 |  |  |
Artisan on Second [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 118 |  |  |
Initial Cost to Company, Land |  | $ 8,000,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 36,074,600 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 469,032 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,000,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 36,543,632 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 44,544,032 |  |  |
Accumulated Depreciation |  | (7,896,054) |  |  |
Investment in Real Estate Net |  | 36,647,978 |  |  |
Encumbrances |  | $ 0 |  |  |
Artistry Emeryville (fka Emeryville) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Emeryville, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 261 |  |  |
Initial Cost to Company, Land |  | $ 12,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 61,466,267 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,771,039 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 63,237,306 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 75,537,306 |  |  |
Accumulated Depreciation |  | (9,620,717) |  |  |
Investment in Real Estate Net |  | 65,916,589 |  |  |
Encumbrances |  | $ 0 |  |  |
Avenue Two [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 123 |  |  |
Initial Cost to Company, Land |  | $ 7,995,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,005,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,647,581 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,995,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 19,652,581 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 27,647,581 |  |  |
Accumulated Depreciation |  | (4,179,196) |  |  |
Investment in Real Estate Net |  | 23,468,385 |  |  |
Encumbrances |  | $ 0 |  |  |
Azure [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 273 |  |  |
Initial Cost to Company, Land |  | $ 32,855,115 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 150,600,329 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 629 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 32,855,115 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 150,600,958 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 183,456,073 |  |  |
Accumulated Depreciation |  | (2,077,524) |  |  |
Investment in Real Estate Net |  | 181,378,549 |  |  |
Encumbrances |  | $ 0 |  |  |
Bay Hill [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Long Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 160 |  |  |
Initial Cost to Company, Land |  | $ 7,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 27,437,239 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,934,347 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,371,586 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 36,971,586 |  |  |
Accumulated Depreciation |  | (11,990,933) |  |  |
Investment in Real Estate Net |  | 24,980,653 |  |  |
Encumbrances |  | $ 0 |  |  |
Beatrice, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 302 |  |  |
Initial Cost to Company, Land |  | $ 114,351,405 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 165,648,595 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 676,595 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 114,351,405 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 166,325,190 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 280,676,595 |  |  |
Accumulated Depreciation |  | (29,116,223) |  |  |
Investment in Real Estate Net |  | 251,560,372 |  |  |
Encumbrances |  | $ 0 |  |  |
Belle Arts Condominium Homes, LLC [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 1 |  |  |
Initial Cost to Company, Land |  | $ 63,158 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 248,929 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | (5,320) |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 63,158 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 243,609 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 306,767 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 306,767 |  |  |
Encumbrances |  | $ 0 |  |  |
Bella Fontaine [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 102 |  |  |
Initial Cost to Company, Land |  | $ 9,098,808 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 28,701,192 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 473,126 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,098,808 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,174,318 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 38,273,126 |  |  |
Accumulated Depreciation |  | (5,588,486) |  |  |
Investment in Real Estate Net |  | 32,684,640 |  |  |
Encumbrances |  | $ 0 |  |  |
Berkeley Land [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 14,108,910 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 11,357,375 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,108,910 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 11,357,375 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 25,466,285 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 25,466,285 |  |  |
Encumbrances |  | $ 0 |  |  |
Bradford Apartments [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Newington, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 64 |  |  |
Initial Cost to Company, Land |  | $ 401,091 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 2,681,210 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 961,845 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 401,091 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 3,643,055 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 4,044,146 |  |  |
Accumulated Depreciation |  | (2,066,615) |  |  |
Investment in Real Estate Net |  | 1,977,531 |  |  |
Encumbrances |  | $ 0 |  |  |
Breakwater at Marina Del Rey [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 224 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 73,189,262 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 649,866 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 73,839,128 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 73,839,128 |  |  |
Accumulated Depreciation |  | (11,205,489) |  |  |
Investment in Real Estate Net |  | 62,633,639 |  |  |
Encumbrances |  | $ 0 |  |  |
Briar Knoll Apts [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Vernon, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 150 |  |  |
Initial Cost to Company, Land |  | $ 928,972 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 6,209,988 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,633,266 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 928,972 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 8,843,254 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 9,772,226 |  |  |
Accumulated Depreciation |  | (4,794,357) |  |  |
Investment in Real Estate Net |  | 4,977,869 |  |  |
Encumbrances |  | $ 0 |  |  |
Briarwood (CA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Sunnyvale, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 192 |  |  |
Initial Cost to Company, Land |  | $ 9,991,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 22,247,278 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,514,394 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,991,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,761,672 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,753,172 |  |  |
Accumulated Depreciation |  | (14,944,409) |  |  |
Investment in Real Estate Net |  | 20,808,763 |  |  |
Encumbrances |  | $ 0 |  |  |
Bridford Lakes II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Greensboro, NC |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 1,100,564 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 792,508 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,100,564 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 792,508 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 1,893,072 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 1,893,072 |  |  |
Encumbrances |  | $ 0 |  |  |
Brooklyner (fka 111 Lawrence) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 490 |  |  |
Initial Cost to Company, Land |  | $ 40,099,922 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 221,438,631 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,387,079 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 40,099,922 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 222,825,710 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 262,925,632 |  |  |
Accumulated Depreciation |  | (38,804,697) |  |  |
Investment in Real Estate Net |  | 224,120,935 |  |  |
Encumbrances |  | $ 0 |  |  |
Cambridge Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 312 |  |  |
Initial Cost to Company, Land |  | $ 31,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 106,048,587 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,123,216 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 31,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 108,171,803 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 139,371,803 |  |  |
Accumulated Depreciation |  | (15,523,923) |  |  |
Investment in Real Estate Net |  | 123,847,880 |  |  |
Encumbrances |  | $ 0 |  |  |
Carlyle Mill [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 317 |  |  |
Initial Cost to Company, Land |  | $ 10,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 51,367,913 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,134,848 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 58,502,761 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 68,502,761 |  |  |
Accumulated Depreciation |  | (26,086,693) |  |  |
Investment in Real Estate Net |  | 42,416,068 |  |  |
Encumbrances |  | $ 0 |  |  |
Cascade [Domain] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 23,751,564 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 43,951,916 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,751,564 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 43,951,916 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 67,703,480 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 67,703,480 |  |  |
Encumbrances |  | $ 0 |  |  |
Centennial (fka Centennial Court & Centennial Tower) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 408 |  |  |
Initial Cost to Company, Land |  | $ 9,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 70,080,378 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 8,150,667 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 78,231,045 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 87,931,045 |  |  |
Accumulated Depreciation |  | (30,555,738) |  |  |
Investment in Real Estate Net |  | 57,375,307 |  |  |
Encumbrances |  | $ 0 |  |  |
Centre Club Combined [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Ontario, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 412 |  |  |
Initial Cost to Company, Land |  | $ 7,436,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,014,789 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,071,471 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,436,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,086,260 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 46,522,260 |  |  |
Accumulated Depreciation |  | (20,011,745) |  |  |
Investment in Real Estate Net |  | 26,510,515 |  |  |
Encumbrances |  | $ 0 |  |  |
Church Corner [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 85 |  |  |
Initial Cost to Company, Land |  | $ 5,220,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,744,643 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,021,207 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,220,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,765,850 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 23,985,850 |  |  |
Accumulated Depreciation |  | (7,784,093) |  |  |
Investment in Real Estate Net |  | 16,201,757 |  |  |
Encumbrances |  | $ 0 |  |  |
City Gate at Cupertino (fka Cupertino) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cupertino, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 311 |  |  |
Initial Cost to Company, Land |  | $ 40,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 95,937,046 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,164,548 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 40,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 99,101,594 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 139,501,594 |  |  |
Accumulated Depreciation |  | (13,831,042) |  |  |
Investment in Real Estate Net |  | 125,670,552 |  |  |
Encumbrances |  | $ 0 |  |  |
City Pointe [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Fullerton, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 183 |  |  |
Initial Cost to Company, Land |  | $ 6,863,792 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 36,476,208 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 799,333 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,863,792 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,275,541 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 44,139,333 |  |  |
Accumulated Depreciation |  | (10,525,198) |  |  |
Investment in Real Estate Net |  | 33,614,135 |  |  |
Encumbrances |  | $ 0 |  |  |
City Square Bellevue (fka Bellevue) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 191 |  |  |
Initial Cost to Company, Land |  | $ 15,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 41,876,257 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,633,430 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,509,687 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 59,609,687 |  |  |
Accumulated Depreciation |  | (6,132,286) |  |  |
Investment in Real Estate Net |  | 53,477,401 |  |  |
Encumbrances |  | $ 0 |  |  |
Clarendon, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 292 |  |  |
Initial Cost to Company, Land |  | $ 30,400,340 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 103,824,660 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,066,458 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 30,400,340 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 105,891,118 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 136,291,458 |  |  |
Accumulated Depreciation |  | (22,819,650) |  |  |
Investment in Real Estate Net |  | 113,471,808 |  |  |
Encumbrances |  | $ 0 |  |  |
Cleo, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 92 |  |  |
Initial Cost to Company, Land |  | $ 6,615,467 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,829,335 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,799,207 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,615,467 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,628,542 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 25,244,009 |  |  |
Accumulated Depreciation |  | (7,638,498) |  |  |
Investment in Real Estate Net |  | 17,605,511 |  |  |
Encumbrances |  | $ 0 |  |  |
Corcoran House at DuPont Circle (fka DuPont Circle) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 137 |  |  |
Initial Cost to Company, Land |  | $ 13,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,913,113 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,352,210 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 28,265,323 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 41,765,323 |  |  |
Accumulated Depreciation |  | (4,701,324) |  |  |
Investment in Real Estate Net |  | 37,063,999 |  |  |
Encumbrances |  | $ 0 |  |  |
Courthouse Plaza [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 396 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 87,386,024 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,941,196 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 91,327,220 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 91,327,220 |  |  |
Accumulated Depreciation |  | (14,489,207) |  |  |
Investment in Real Estate Net |  | 76,838,013 |  |  |
Encumbrances |  | $ 0 |  |  |
Creekside (San Mateo) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Mateo, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 192 |  |  |
Initial Cost to Company, Land |  | $ 9,606,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,193,232 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,681,274 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,606,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,874,506 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 34,481,106 |  |  |
Accumulated Depreciation |  | (14,783,421) |  |  |
Investment in Real Estate Net |  | 19,697,685 |  |  |
Encumbrances |  | $ 0 |  |  |
Cronins Landing [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Waltham, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 281 |  |  |
Initial Cost to Company, Land |  | $ 32,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 85,119,324 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,008,274 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 32,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 88,127,598 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 120,427,598 |  |  |
Accumulated Depreciation |  | (12,711,972) |  |  |
Investment in Real Estate Net |  | 107,715,626 |  |  |
Encumbrances |  | $ 0 |  |  |
Crystal Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 181 |  |  |
Initial Cost to Company, Land |  | $ 17,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 47,918,975 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,609,270 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 50,528,245 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 67,728,245 |  |  |
Accumulated Depreciation |  | (7,196,001) |  |  |
Investment in Real Estate Net |  | 60,532,244 |  |  |
Encumbrances |  | $ 0 |  |  |
Dean Estates [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Taunton, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 58 |  |  |
Initial Cost to Company, Land |  | $ 498,080 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,329,560 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 840,538 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 498,080 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 4,170,098 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 4,668,178 |  |  |
Accumulated Depreciation |  | (2,431,087) |  |  |
Investment in Real Estate Net |  | 2,237,091 |  |  |
Encumbrances |  | $ 0 |  |  |
Eagle Canyon [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chino Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 252 |  |  |
Initial Cost to Company, Land |  | $ 1,808,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,274,361 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 8,358,167 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,808,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,632,528 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 26,441,428 |  |  |
Accumulated Depreciation |  | (16,229,794) |  |  |
Investment in Real Estate Net |  | 10,211,634 |  |  |
Encumbrances |  | $ 0 |  |  |
Edgemont at Bethesda Metro [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bethesda, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 122 |  |  |
Initial Cost to Company, Land |  | $ 13,092,552 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 43,907,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 947,391 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,092,552 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,854,839 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 57,947,391 |  |  |
Accumulated Depreciation |  | (8,612,518) |  |  |
Investment in Real Estate Net |  | 49,334,873 |  |  |
Encumbrances |  | $ 0 |  |  |
Elevé [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Glendale, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 208 |  |  |
Initial Cost to Company, Land |  | $ 14,080,560 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 56,419,440 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 186,855 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,080,560 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 56,606,295 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 70,686,855 |  |  |
Accumulated Depreciation |  | (5,258,108) |  |  |
Investment in Real Estate Net |  | 65,428,747 |  |  |
Encumbrances |  | $ 0 |  |  |
Emerson Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 444 |  |  |
Initial Cost to Company, Land |  | $ 14,855,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 57,566,636 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 18,997,536 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,855,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 76,564,172 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 91,419,172 |  |  |
Accumulated Depreciation |  | (49,539,039) |  |  |
Investment in Real Estate Net |  | 41,880,133 |  |  |
Encumbrances |  | $ 0 |  |  |
Encinitas Heights (fka Encinitas) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Encinitas, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 120 |  |  |
Initial Cost to Company, Land |  | $ 12,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,207,497 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 294,376 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,501,873 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 41,501,873 |  |  |
Accumulated Depreciation |  | (4,700,031) |  |  |
Investment in Real Estate Net |  | 36,801,842 |  |  |
Encumbrances |  | $ 0 |  |  |
Encore at Sherman Oaks, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Sherman Oaks, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 174 |  |  |
Initial Cost to Company, Land |  | $ 8,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 25,446,003 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,110,902 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,556,905 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,256,905 |  |  |
Accumulated Depreciation |  | (6,547,074) |  |  |
Investment in Real Estate Net |  | 28,709,831 |  |  |
Encumbrances |  | $ 0 |  |  |
Fountains at Emerald Park (fka Emerald Park) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Dublin, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 324 |  |  |
Initial Cost to Company, Land |  | $ 25,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 83,986,217 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 742,760 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 25,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 84,728,977 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 110,628,977 |  |  |
Accumulated Depreciation |  | (12,566,319) |  |  |
Investment in Real Estate Net |  | 98,062,658 |  |  |
Encumbrances |  | $ 0 |  |  |
Fox Hill Apartments [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Enfield, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 168 |  |  |
Initial Cost to Company, Land |  | $ 1,129,018 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,547,256 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,297,171 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,129,018 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 9,844,427 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 10,973,445 |  |  |
Accumulated Depreciation |  | (5,478,777) |  |  |
Investment in Real Estate Net |  | 5,494,668 |  |  |
Encumbrances |  | $ 0 |  |  |
Fremont Center [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Fremont, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 322 |  |  |
Initial Cost to Company, Land |  | $ 25,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 78,753,114 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,392,624 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 25,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 80,145,738 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 105,945,738 |  |  |
Accumulated Depreciation |  | (11,547,488) |  |  |
Investment in Real Estate Net |  | 94,398,250 |  |  |
Encumbrances |  | $ 0 |  |  |
Gallery, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Hermosa Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 169 |  |  |
Initial Cost to Company, Land |  | $ 18,144,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 46,567,941 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,495,809 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,144,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 49,063,750 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 67,207,750 |  |  |
Accumulated Depreciation |  | (18,185,915) |  |  |
Investment in Real Estate Net |  | 49,021,835 |  |  |
Encumbrances |  | $ 0 |  |  |
Gateway at Malden Center [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Malden, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 203 |  |  |
Initial Cost to Company, Land |  | $ 9,209,780 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 25,722,666 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 13,139,391 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,209,780 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 38,862,057 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,071,837 |  |  |
Accumulated Depreciation |  | (19,457,428) |  |  |
Investment in Real Estate Net |  | 28,614,409 |  |  |
Encumbrances |  | $ 0 |  |  |
Geary Court Yard [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 164 |  |  |
Initial Cost to Company, Land |  | $ 1,722,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 15,471,429 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,137,461 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,722,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 19,608,890 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,331,290 |  |  |
Accumulated Depreciation |  | (11,745,089) |  |  |
Investment in Real Estate Net |  | 9,586,201 |  |  |
Encumbrances |  | $ 0 |  |  |
Glen Meadow [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Franklin, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 288 |  |  |
Initial Cost to Company, Land |  | $ 2,339,330 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,133,588 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,187,941 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,339,330 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,321,529 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 22,660,859 |  |  |
Accumulated Depreciation |  | (12,098,366) |  |  |
Investment in Real Estate Net |  | 10,562,493 |  |  |
Encumbrances |  | $ 0 |  |  |
Greenfield Village [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Rocky Hill , CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 151 |  |  |
Initial Cost to Company, Land |  | $ 911,534 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 6,093,418 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 827,545 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 911,534 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,920,963 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 7,832,497 |  |  |
Accumulated Depreciation |  | (3,865,157) |  |  |
Investment in Real Estate Net |  | 3,967,340 |  |  |
Encumbrances |  | $ 0 |  |  |
Hampshire Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 259 |  |  |
Initial Cost to Company, Land |  | $ 10,806,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 30,335,330 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,646,785 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,806,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,982,115 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 44,788,115 |  |  |
Accumulated Depreciation |  | (14,251,207) |  |  |
Investment in Real Estate Net |  | 30,536,908 |  |  |
Encumbrances |  | $ 0 |  |  |
Harbor Steps [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 758 |  |  |
Initial Cost to Company, Land |  | $ 59,387,158 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 158,829,432 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 15,887,513 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 59,387,158 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 174,716,945 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 234,104,103 |  |  |
Accumulated Depreciation |  | (66,524,689) |  |  |
Investment in Real Estate Net |  | 167,579,414 |  |  |
Encumbrances |  | $ 0 |  |  |
Heritage at Stone Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Burlington, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 180 |  |  |
Initial Cost to Company, Land |  | $ 10,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 31,808,335 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,471,640 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,279,975 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 44,079,975 |  |  |
Accumulated Depreciation |  | (12,980,415) |  |  |
Investment in Real Estate Net |  | 31,099,560 |  |  |
Encumbrances |  | $ 0 |  |  |
Heritage Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Lynwood, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 197 |  |  |
Initial Cost to Company, Land |  | $ 6,895,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,983,597 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,006,685 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,895,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 19,990,282 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 26,885,282 |  |  |
Accumulated Depreciation |  | (8,656,120) |  |  |
Investment in Real Estate Net |  | 18,229,162 |  |  |
Encumbrances |  | $ 0 |  |  |
Heron Pointe [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boynton Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 192 |  |  |
Initial Cost to Company, Land |  | $ 1,546,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,774,676 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,626,877 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,546,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 10,401,553 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 11,948,253 |  |  |
Accumulated Depreciation |  | (7,058,305) |  |  |
Investment in Real Estate Net |  | 4,889,948 |  |  |
Encumbrances |  | $ 0 |  |  |
Hesby [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | North Hollywood, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 308 |  |  |
Initial Cost to Company, Land |  | $ 23,299,892 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 102,700,108 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 203,388 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,299,892 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 102,903,496 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 126,203,388 |  |  |
Accumulated Depreciation |  | (9,214,042) |  |  |
Investment in Real Estate Net |  | 116,989,346 |  |  |
Encumbrances |  | $ 0 |  |  |
High Meadow [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Ellington, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 100 |  |  |
Initial Cost to Company, Land |  | $ 583,679 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,901,774 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,342,073 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 583,679 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 5,243,847 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 5,827,526 |  |  |
Accumulated Depreciation |  | (2,886,630) |  |  |
Investment in Real Estate Net |  | 2,940,896 |  |  |
Encumbrances |  | $ 0 |  |  |
Highland Glen [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Westwood, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 180 |  |  |
Initial Cost to Company, Land |  | $ 2,229,095 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,828,153 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,895,346 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,229,095 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 19,723,499 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,952,594 |  |  |
Accumulated Depreciation |  | (10,982,160) |  |  |
Investment in Real Estate Net |  | 10,970,434 |  |  |
Encumbrances |  | $ 0 |  |  |
Highland Glen II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Westwood, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 102 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 19,875,857 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 203,172 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,079,029 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 20,079,029 |  |  |
Accumulated Depreciation |  | (6,387,155) |  |  |
Investment in Real Estate Net |  | 13,691,874 |  |  |
Encumbrances |  | $ 0 |  |  |
Highlands at Cherry Hill [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cherry Hills, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 170 |  |  |
Initial Cost to Company, Land |  | $ 6,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,459,108 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,058,592 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,517,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 29,317,700 |  |  |
Accumulated Depreciation |  | (8,801,180) |  |  |
Investment in Real Estate Net |  | 20,516,520 |  |  |
Encumbrances |  | $ 0 |  |  |
Highlands At South Plainfield [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | South Plainfield, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 252 |  |  |
Initial Cost to Company, Land |  | $ 10,080,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 37,526,912 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,313,527 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,080,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 38,840,439 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,920,439 |  |  |
Accumulated Depreciation |  | (14,496,059) |  |  |
Investment in Real Estate Net |  | 34,424,380 |  |  |
Encumbrances |  | $ 0 |  |  |
Hikari [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 128 |  |  |
Initial Cost to Company, Land |  | $ 9,435,760 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 32,564,240 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 494,697 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,435,760 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,058,937 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 42,494,697 |  |  |
Accumulated Depreciation |  | (6,882,542) |  |  |
Investment in Real Estate Net |  | 35,612,155 |  |  |
Encumbrances |  | $ 0 |  |  |
Hudson Crossing [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 259 |  |  |
Initial Cost to Company, Land |  | $ 23,420,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 69,977,699 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,026,803 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,420,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 72,004,502 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 95,424,502 |  |  |
Accumulated Depreciation |  | (28,426,002) |  |  |
Investment in Real Estate Net |  | 66,998,500 |  |  |
Encumbrances |  | $ 0 |  |  |
Hudson Crossing II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 10,599,286 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 2,025,249 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,599,286 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 2,025,249 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 12,624,535 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 12,624,535 |  |  |
Encumbrances |  | $ 0 |  |  |
Hudson Pointe [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 182 |  |  |
Initial Cost to Company, Land |  | $ 5,350,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 41,114,074 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,378,496 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,350,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,492,570 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 49,842,570 |  |  |
Accumulated Depreciation |  | (18,501,842) |  |  |
Investment in Real Estate Net |  | 31,340,728 |  |  |
Encumbrances |  | $ 0 |  |  |
Hunt Club II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Charlotte, NC |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 100,000 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 100,000 |  |  |
Encumbrances |  | $ 0 |  |  |
Ivory Wood [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bothell, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 144 |  |  |
Initial Cost to Company, Land |  | $ 2,732,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 13,888,282 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 874,464 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,732,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 14,762,746 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,495,546 |  |  |
Accumulated Depreciation |  | (6,352,195) |  |  |
Investment in Real Estate Net |  | 11,143,351 |  |  |
Encumbrances |  | $ 0 |  |  |
Jia [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 280 |  |  |
Initial Cost to Company, Land |  | $ 14,791,831 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 76,010,218 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 115,966 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,791,831 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 76,126,184 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 90,918,015 |  |  |
Accumulated Depreciation |  | (7,438,023) |  |  |
Investment in Real Estate Net |  | 83,479,992 |  |  |
Encumbrances |  | $ 0 |  |  |
Junction 47 (fka West Seattle) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 206 |  |  |
Initial Cost to Company, Land |  | $ 11,726,305 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 54,388,245 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 45 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,726,305 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 54,388,290 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 66,114,595 |  |  |
Accumulated Depreciation |  | (684,861) |  |  |
Investment in Real Estate Net |  | 65,429,734 |  |  |
Encumbrances |  | $ 0 |  |  |
Kelvin, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 194 |  |  |
Initial Cost to Company, Land |  | $ 15,521,552 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 64,853,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 10,657 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,521,552 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 64,864,105 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 80,385,657 |  |  |
Accumulated Depreciation |  | (1,340,371) |  |  |
Investment in Real Estate Net |  | 79,045,286 |  |  |
Encumbrances |  | $ 0 |  |  |
Kendall Square II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 1,105,465 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 1,105,465 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 1,105,465 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 1,105,465 |  |  |
Encumbrances |  | $ 0 |  |  |
Landings at Port Imperial [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | W. New York, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 276 |  |  |
Initial Cost to Company, Land |  | $ 27,246,045 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 37,741,050 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,917,500 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 27,246,045 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 45,658,550 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 72,904,595 |  |  |
Accumulated Depreciation |  | (25,157,567) |  |  |
Investment in Real Estate Net |  | 47,747,028 |  |  |
Encumbrances |  | $ 0 |  |  |
Lincoln Heights [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 336 |  |  |
Initial Cost to Company, Land |  | $ 5,928,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,595,262 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 12,316,194 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,928,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 45,911,456 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 51,839,856 |  |  |
Accumulated Depreciation |  | (29,948,038) |  |  |
Investment in Real Estate Net |  | 21,891,818 |  |  |
Encumbrances |  | $ 0 |  |  |
Lindley Apartments [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Encino, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 129 |  |  |
Initial Cost to Company, Land |  | $ 5,805,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 25,705,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 797,056 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,805,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,502,056 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 32,307,056 |  |  |
Accumulated Depreciation |  | (6,457,391) |  |  |
Investment in Real Estate Net |  | 25,849,665 |  |  |
Encumbrances |  | $ 0 |  |  |
Loft 590 [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 212 |  |  |
Initial Cost to Company, Land |  | $ 20,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 67,909,023 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 291,850 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 20,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 68,200,873 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 88,300,873 |  |  |
Accumulated Depreciation |  | (9,179,835) |  |  |
Investment in Real Estate Net |  | 79,121,038 |  |  |
Encumbrances |  | $ 0 |  |  |
Lofts at Kendall Square (fka Kendall Square) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 186 |  |  |
Initial Cost to Company, Land |  | $ 23,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 78,445,657 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,174,184 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 82,619,841 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 105,919,841 |  |  |
Accumulated Depreciation |  | (11,149,971) |  |  |
Investment in Real Estate Net |  | 94,769,870 |  |  |
Encumbrances |  | $ 0 |  |  |
Longacre House [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 293 |  |  |
Initial Cost to Company, Land |  | $ 73,170,045 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 53,962,510 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,449,025 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 73,170,045 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 55,411,535 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 128,581,580 |  |  |
Accumulated Depreciation |  | (19,189,340) |  |  |
Investment in Real Estate Net |  | 109,392,240 |  |  |
Encumbrances |  | $ 0 |  |  |
Longfellow Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 710 |  |  |
Initial Cost to Company, Land |  | $ 47,096,917 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 153,899,994 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 73,147,489 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 47,096,917 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 227,047,483 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 274,144,400 |  |  |
Accumulated Depreciation |  | (129,782,488) |  |  |
Investment in Real Estate Net |  | 144,361,912 |  |  |
Encumbrances |  | $ 0 |  |  |
Mantena [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 98 |  |  |
Initial Cost to Company, Land |  | $ 22,346,513 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 61,501,158 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 492,732 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,346,513 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 61,993,890 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 84,340,403 |  |  |
Accumulated Depreciation |  | (9,234,987) |  |  |
Investment in Real Estate Net |  | 75,105,416 |  |  |
Encumbrances |  | $ 0 |  |  |
Marina 41 (fka Marina Del Rey) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 623 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 168,842,442 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,909,098 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 173,751,540 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 173,751,540 |  |  |
Accumulated Depreciation |  | (27,415,993) |  |  |
Investment in Real Estate Net |  | 146,335,547 |  |  |
Encumbrances |  | $ 0 |  |  |
Mariposa at Playa Del Rey (fka Playa Del Rey) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Playa Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 354 |  |  |
Initial Cost to Company, Land |  | $ 60,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 89,311,482 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,016,502 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 60,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 93,327,984 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 154,227,984 |  |  |
Accumulated Depreciation |  | (13,774,366) |  |  |
Investment in Real Estate Net |  | 140,453,618 |  |  |
Encumbrances |  | $ 0 |  |  |
Milano Lofts [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 99 |  |  |
Initial Cost to Company, Land |  | $ 8,125,216 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 27,378,784 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 381,581 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,125,216 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 27,760,365 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,885,581 |  |  |
Accumulated Depreciation |  | (4,712,661) |  |  |
Investment in Real Estate Net |  | 31,172,920 |  |  |
Encumbrances |  | $ 0 |  |  |
Monte Viejo [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Phoenix, AZ |  |  |
Real Estate And Accumulated Depreciation Units |  | 480 |  |  |
Initial Cost to Company, Land |  | $ 12,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 45,926,784 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,757,827 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 47,684,611 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 60,384,611 |  |  |
Accumulated Depreciation |  | (19,906,193) |  |  |
Investment in Real Estate Net |  | 40,478,418 |  |  |
Encumbrances |  | $ 0 |  |  |
Mountain View Redevelopment [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Mountain View, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 6,539 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,539 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 6,539 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 6,539 |  |  |
Encumbrances |  | $ 0 |  |  |
Mozaic at Union Station [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 272 |  |  |
Initial Cost to Company, Land |  | $ 8,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 52,529,446 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,554,378 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 54,083,824 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 62,583,824 |  |  |
Accumulated Depreciation |  | (18,494,933) |  |  |
Investment in Real Estate Net |  | 44,088,891 |  |  |
Encumbrances |  | $ 0 |  |  |
Murray Hill Tower (fka Murray Hill) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 270 |  |  |
Initial Cost to Company, Land |  | $ 75,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 102,705,401 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,764,623 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 75,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 106,470,024 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 182,270,024 |  |  |
Accumulated Depreciation |  | (17,676,937) |  |  |
Investment in Real Estate Net |  | 164,593,087 |  |  |
Encumbrances |  | $ 0 |  |  |
Northglen [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 234 |  |  |
Initial Cost to Company, Land |  | $ 9,360,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,778,553 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,259,421 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,360,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 23,037,974 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 32,397,974 |  |  |
Accumulated Depreciation |  | (12,381,522) |  |  |
Investment in Real Estate Net |  | 20,016,452 |  |  |
Encumbrances |  | $ 0 |  |  |
Northpark [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Burlingame, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 510 |  |  |
Initial Cost to Company, Land |  | $ 38,607,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 77,472,217 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 11,916,802 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 38,607,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 89,389,019 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 127,996,019 |  |  |
Accumulated Depreciation |  | (25,399,200) |  |  |
Investment in Real Estate Net |  | 102,596,819 |  |  |
Encumbrances |  | $ 0 |  |  |
Northridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pleasant Hill, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 221 |  |  |
Initial Cost to Company, Land |  | $ 5,527,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,691,705 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 10,416,100 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,527,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,107,805 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,635,605 |  |  |
Accumulated Depreciation |  | (16,166,627) |  |  |
Investment in Real Estate Net |  | 14,468,978 |  |  |
Encumbrances |  | $ 0 |  |  |
Oak Park Combined [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Agoura Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 444 |  |  |
Initial Cost to Company, Land |  | $ 3,390,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 30,517,274 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,019,341 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,390,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,536,615 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 42,927,315 |  |  |
Accumulated Depreciation |  | (27,064,200) |  |  |
Investment in Real Estate Net |  | 15,863,115 |  |  |
Encumbrances |  | $ 0 |  |  |
Oakwood Boston [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 94 |  |  |
Initial Cost to Company, Land |  | $ 22,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 28,672,979 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,262,957 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,935,936 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 52,135,936 |  |  |
Accumulated Depreciation |  | (4,761,170) |  |  |
Investment in Real Estate Net |  | 47,374,766 |  |  |
Encumbrances |  | $ 0 |  |  |
Oakwood Crystal City [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 162 |  |  |
Initial Cost to Company, Land |  | $ 15,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 35,474,336 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 747,540 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 36,221,876 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 51,621,876 |  |  |
Accumulated Depreciation |  | (5,451,482) |  |  |
Investment in Real Estate Net |  | 46,170,394 |  |  |
Encumbrances |  | $ 0 |  |  |
Oakwood Marina Del Rey [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 597 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 120,795,359 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,191,084 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 122,986,443 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 122,986,443 |  |  |
Accumulated Depreciation |  | (19,217,166) |  |  |
Investment in Real Estate Net |  | 103,769,277 |  |  |
Encumbrances |  | $ 0 |  |  |
Ocean Crest [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Solana Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 146 |  |  |
Initial Cost to Company, Land |  | $ 5,111,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 11,910,438 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,243,097 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,111,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,153,535 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 20,264,735 |  |  |
Accumulated Depreciation |  | (9,238,961) |  |  |
Investment in Real Estate Net |  | 11,025,774 |  |  |
Encumbrances |  | $ 0 |  |  |
Odin (fka Tallman) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 301 |  |  |
Initial Cost to Company, Land |  | $ 16,807,519 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 63,101,811 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 241 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,807,519 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 63,102,052 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 79,909,571 |  |  |
Accumulated Depreciation |  | (623,866) |  |  |
Investment in Real Estate Net |  | 79,285,705 |  |  |
Encumbrances |  | $ 0 |  |  |
Old Town Lofts [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 149 |  |  |
Initial Cost to Company, Land |  | $ 7,740,467 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 44,146,181 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 159,751 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,740,467 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,305,932 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 52,046,399 |  |  |
Accumulated Depreciation |  | (734,373) |  |  |
Investment in Real Estate Net |  | 51,312,026 |  |  |
Encumbrances |  | $ 0 |  |  |
One Henry Adams [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 30,224,393 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 59,682,378 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 30,224,393 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 59,682,378 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 89,906,771 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 89,906,771 |  |  |
Encumbrances |  | $ 0 |  |  |
Pacific Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 430 |  |  |
Initial Cost to Company, Land |  | $ 32,250,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 110,750,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 989,768 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 32,250,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 111,739,768 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 143,989,768 |  |  |
Accumulated Depreciation |  | (13,998,683) |  |  |
Investment in Real Estate Net |  | 129,991,085 |  |  |
Encumbrances |  | $ 0 |  |  |
Parc 77 [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 137 |  |  |
Initial Cost to Company, Land |  | $ 40,504,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,025,679 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,558,590 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 40,504,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 23,584,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 64,088,269 |  |  |
Accumulated Depreciation |  | (10,342,724) |  |  |
Investment in Real Estate Net |  | 53,745,545 |  |  |
Encumbrances |  | $ 0 |  |  |
Parc Cameron [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 166 |  |  |
Initial Cost to Company, Land |  | $ 37,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,855,597 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,604,055 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 37,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 16,459,652 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 54,059,652 |  |  |
Accumulated Depreciation |  | (8,709,483) |  |  |
Investment in Real Estate Net |  | 45,350,169 |  |  |
Encumbrances |  | $ 0 |  |  |
Parc Coliseum [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 177 |  |  |
Initial Cost to Company, Land |  | $ 52,654,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,045,751 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 8,549,855 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 52,654,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 31,595,606 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 84,249,606 |  |  |
Accumulated Depreciation |  | (14,193,545) |  |  |
Investment in Real Estate Net |  | 70,056,061 |  |  |
Encumbrances |  | $ 0 |  |  |
Parc East Towers [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 324 |  |  |
Initial Cost to Company, Land |  | $ 102,163,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 108,989,402 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 8,398,427 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 102,163,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 117,387,829 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 219,550,829 |  |  |
Accumulated Depreciation |  | (40,021,695) |  |  |
Investment in Real Estate Net |  | 179,529,134 |  |  |
Encumbrances |  | $ 0 |  |  |
Parc on Powell (fka Parkside at Emeryville) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Emeryville, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 173 |  |  |
Initial Cost to Company, Land |  | $ 16,667,059 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 66,308,322 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,993 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,667,059 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 66,313,315 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 82,980,374 |  |  |
Accumulated Depreciation |  | (1,386,523) |  |  |
Investment in Real Estate Net |  | 81,593,851 |  |  |
Encumbrances |  | $ 0 |  |  |
Park at Pentagon Row (fka Pentagon City) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 298 |  |  |
Initial Cost to Company, Land |  | $ 28,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 78,838,184 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 700,661 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 28,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 79,538,845 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 107,838,845 |  |  |
Accumulated Depreciation |  | (11,504,796) |  |  |
Investment in Real Estate Net |  | 96,334,049 |  |  |
Encumbrances |  | $ 0 |  |  |
Park Connecticut [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 142 |  |  |
Initial Cost to Company, Land |  | $ 13,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 59,087,519 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 757,785 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 59,845,304 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 73,545,304 |  |  |
Accumulated Depreciation |  | (8,000,115) |  |  |
Investment in Real Estate Net |  | 65,545,189 |  |  |
Encumbrances |  | $ 0 |  |  |
Park Hacienda (fka Hacienda) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pleasanton, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 540 |  |  |
Initial Cost to Company, Land |  | $ 43,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 128,753,359 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 774,074 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 43,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 129,527,433 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 172,727,433 |  |  |
Accumulated Depreciation |  | (19,900,917) |  |  |
Investment in Real Estate Net |  | 152,826,516 |  |  |
Encumbrances |  | $ 0 |  |  |
Park West (CA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 444 |  |  |
Initial Cost to Company, Land |  | $ 3,033,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 27,302,383 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,419,065 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,033,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 36,721,448 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 39,754,948 |  |  |
Accumulated Depreciation |  | (24,776,986) |  |  |
Investment in Real Estate Net |  | 14,977,962 |  |  |
Encumbrances |  | $ 0 |  |  |
Parkside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Union City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 208 |  |  |
Initial Cost to Company, Land |  | $ 6,246,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 11,827,453 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,981,119 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,246,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,808,572 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 22,055,272 |  |  |
Accumulated Depreciation |  | (10,527,862) |  |  |
Investment in Real Estate Net |  | 11,527,410 |  |  |
Encumbrances |  | $ 0 |  |  |
Pearl, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 80 |  |  |
Initial Cost to Company, Land |  | $ 6,972,585 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,527,415 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,972,585 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,527,415 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,500,000 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 33,500,000 |  |  |
Encumbrances |  | $ 0 |  |  |
Pegasus [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 322 |  |  |
Initial Cost to Company, Land |  | $ 18,094,052 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 81,905,948 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,764,585 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,094,052 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 84,670,533 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 102,764,585 |  |  |
Accumulated Depreciation |  | (19,826,265) |  |  |
Investment in Real Estate Net |  | 82,938,320 |  |  |
Encumbrances |  | $ 0 |  |  |
Phillips Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Wellesley, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 49 |  |  |
Initial Cost to Company, Land |  | $ 816,922 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 5,460,955 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,157,352 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 816,922 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,618,307 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 7,435,229 |  |  |
Accumulated Depreciation |  | (3,766,443) |  |  |
Investment in Real Estate Net |  | 3,668,786 |  |  |
Encumbrances |  | $ 0 |  |  |
Playa Pacifica [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Hermosa Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 285 |  |  |
Initial Cost to Company, Land |  | $ 35,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,473,822 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 12,699,944 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 35,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 46,173,766 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 81,273,766 |  |  |
Accumulated Depreciation |  | (19,897,231) |  |  |
Investment in Real Estate Net |  | 61,376,535 |  |  |
Encumbrances |  | $ 0 |  |  |
Portofino [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chino Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 176 |  |  |
Initial Cost to Company, Land |  | $ 3,572,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,660,994 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,510,897 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,572,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,171,891 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,744,291 |  |  |
Accumulated Depreciation |  | (11,352,508) |  |  |
Investment in Real Estate Net |  | 10,391,783 |  |  |
Encumbrances |  | $ 0 |  |  |
Portofino (Val) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 216 |  |  |
Initial Cost to Company, Land |  | $ 8,640,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,487,126 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,296,844 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,640,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,783,970 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,423,970 |  |  |
Accumulated Depreciation |  | (13,318,844) |  |  |
Investment in Real Estate Net |  | 20,105,126 |  |  |
Encumbrances |  | $ 0 |  |  |
Portside Towers [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 527 |  |  |
Initial Cost to Company, Land |  | $ 22,487,006 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 96,842,913 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 19,873,490 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,487,006 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 116,716,403 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 139,203,409 |  |  |
Accumulated Depreciation |  | (71,088,414) |  |  |
Investment in Real Estate Net |  | 68,114,995 |  |  |
Encumbrances |  | $ 0 |  |  |
Potrero 1010 [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 40,830,011 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 133,910,937 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 40,830,011 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 133,910,937 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 174,740,948 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 174,740,948 |  |  |
Encumbrances |  | $ 0 |  |  |
Prado (fka Glendale) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Glendale, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 264 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 67,977,313 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,061,951 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 70,039,264 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 70,039,264 |  |  |
Accumulated Depreciation |  | (9,953,439) |  |  |
Investment in Real Estate Net |  | 60,085,825 |  |  |
Encumbrances |  | $ 0 |  |  |
Prime, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 256 |  |  |
Initial Cost to Company, Land |  | $ 32,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 64,436,539 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,301,267 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 32,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 65,737,806 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 97,737,806 |  |  |
Accumulated Depreciation |  | (23,364,019) |  |  |
Investment in Real Estate Net |  | 74,373,787 |  |  |
Encumbrances |  | $ 0 |  |  |
Prism at Park Avenue South (fka 400 Park Aveue South (EQR)) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 269 |  |  |
Initial Cost to Company, Land |  | $ 76,292,169 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 163,700,126 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 76,292,169 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 163,700,126 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 239,992,295 |  |  |
Accumulated Depreciation |  | (5,492,140) |  |  |
Investment in Real Estate Net |  | 234,500,155 |  |  |
Encumbrances |  | $ 0 |  |  |
Promenade at Town Center I & II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 564 |  |  |
Initial Cost to Company, Land |  | $ 28,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 69,795,915 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,471,517 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 28,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 75,267,432 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 103,467,432 |  |  |
Accumulated Depreciation |  | (33,050,350) |  |  |
Investment in Real Estate Net |  | 70,417,082 |  |  |
Encumbrances |  | $ 0 |  |  |
Quarry Hills [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 316 |  |  |
Initial Cost to Company, Land |  | $ 26,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 84,411,162 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 813,007 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 26,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 85,224,169 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 112,124,169 |  |  |
Accumulated Depreciation |  | (12,835,782) |  |  |
Investment in Real Estate Net |  | 99,288,387 |  |  |
Encumbrances |  | $ 0 |  |  |
Red 160 (fka Redmond Way) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 250 |  |  |
Initial Cost to Company, Land |  | $ 15,546,376 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 65,320,010 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 872,804 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,546,376 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 66,192,814 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 81,739,190 |  |  |
Accumulated Depreciation |  | (11,437,349) |  |  |
Investment in Real Estate Net |  | 70,301,841 |  |  |
Encumbrances |  | $ 0 |  |  |
Redmond Court [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 206 |  |  |
Initial Cost to Company, Land |  | $ 10,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,488,745 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 722,527 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 34,211,272 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 44,511,272 |  |  |
Accumulated Depreciation |  | (5,429,653) |  |  |
Investment in Real Estate Net |  | 39,081,619 |  |  |
Encumbrances |  | $ 0 |  |  |
Regency Palms [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Huntington Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 310 |  |  |
Initial Cost to Company, Land |  | $ 1,857,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,713,254 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,591,340 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,857,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,304,594 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 24,161,994 |  |  |
Accumulated Depreciation |  | (15,853,559) |  |  |
Investment in Real Estate Net |  | 8,308,435 |  |  |
Encumbrances |  | $ 0 |  |  |
Renaissance Villas [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 34 |  |  |
Initial Cost to Company, Land |  | $ 2,458,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 4,542,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 148,126 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,458,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 4,690,126 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 7,148,126 |  |  |
Accumulated Depreciation |  | (1,571,899) |  |  |
Investment in Real Estate Net |  | 5,576,227 |  |  |
Encumbrances |  | $ 0 |  |  |
Reserve at Mountain View (fka Mountain View) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Mountain View, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 180 |  |  |
Initial Cost to Company, Land |  | $ 27,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,029,605 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,601,273 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 27,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 35,630,878 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 62,630,878 |  |  |
Accumulated Depreciation |  | (5,569,705) |  |  |
Investment in Real Estate Net |  | 57,061,173 |  |  |
Encumbrances |  | $ 0 |  |  |
Reserve at Potomac Yard [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 588 |  |  |
Initial Cost to Company, Land |  | $ 11,918,917 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 68,862,641 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,339,599 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,918,917 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 76,202,240 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 88,121,157 |  |  |
Accumulated Depreciation |  | (31,804,125) |  |  |
Investment in Real Estate Net |  | 56,317,032 |  |  |
Encumbrances |  | $ 0 |  |  |
Reserve at Town Center I-III (WA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Mill Creek, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 584 |  |  |
Initial Cost to Company, Land |  | $ 16,769,205 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 77,511,523 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,678,501 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,769,205 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 80,190,024 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 96,959,229 |  |  |
Accumulated Depreciation |  | (24,170,095) |  |  |
Investment in Real Estate Net |  | 72,789,134 |  |  |
Encumbrances |  | $ 0 |  |  |
Residences at Westgate I (fka Westage II) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 252 |  |  |
Initial Cost to Company, Land |  | $ 17,859,785 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 107,725,435 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 37,183 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,859,785 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 107,762,618 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 125,622,403 |  |  |
Accumulated Depreciation |  | (6,461,296) |  |  |
Investment in Real Estate Net |  | 119,161,107 |  |  |
Encumbrances |  | $ 0 |  |  |
Residences at Westgate II (fka Westgage III) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 88 |  |  |
Initial Cost to Company, Land |  | $ 12,118,061 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 39,965,098 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,415 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,118,061 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,968,513 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 52,086,574 |  |  |
Accumulated Depreciation |  | (1,103,584) |  |  |
Investment in Real Estate Net |  | 50,982,990 |  |  |
Encumbrances |  | $ 0 |  |  |
Rianna I [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 78 |  |  |
Initial Cost to Company, Land |  | $ 2,268,160 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,864,482 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 500,196 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,268,160 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,364,678 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,632,838 |  |  |
Accumulated Depreciation |  | (4,413,092) |  |  |
Investment in Real Estate Net |  | 13,219,746 |  |  |
Encumbrances |  | $ 0 |  |  |
Ridgewood Village I&II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 408 |  |  |
Initial Cost to Company, Land |  | $ 11,809,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 34,004,048 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,222,765 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,809,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,226,813 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 51,036,313 |  |  |
Accumulated Depreciation |  | (21,544,992) |  |  |
Investment in Real Estate Net |  | 29,491,321 |  |  |
Encumbrances |  | $ 0 |  |  |
Riva Terra I (fka Redwood Shores) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 304 |  |  |
Initial Cost to Company, Land |  | $ 34,963,355 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 84,587,658 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,065,313 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 34,963,355 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 85,652,971 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 120,616,326 |  |  |
Accumulated Depreciation |  | (13,337,511) |  |  |
Investment in Real Estate Net |  | 107,278,815 |  |  |
Encumbrances |  | $ 0 |  |  |
Riva Terra II (fka Harborside) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 149 |  |  |
Initial Cost to Company, Land |  | $ 17,136,645 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,536,531 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,657,715 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,136,645 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 42,194,246 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 59,330,891 |  |  |
Accumulated Depreciation |  | (6,014,126) |  |  |
Investment in Real Estate Net |  | 53,316,765 |  |  |
Encumbrances |  | $ 0 |  |  |
River Tower [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 323 |  |  |
Initial Cost to Company, Land |  | $ 118,669,441 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 98,880,559 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,922,776 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 118,669,441 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 105,803,335 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 224,472,776 |  |  |
Accumulated Depreciation |  | (31,766,311) |  |  |
Investment in Real Estate Net |  | 192,706,465 |  |  |
Encumbrances |  | $ 0 |  |  |
Riverpark [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 319 |  |  |
Initial Cost to Company, Land |  | $ 14,355,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 80,894,049 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 852,454 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,355,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 81,746,503 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 96,101,503 |  |  |
Accumulated Depreciation |  | (15,145,119) |  |  |
Investment in Real Estate Net |  | 80,956,384 |  |  |
Encumbrances |  | $ 0 |  |  |
Rivers Bend (CT) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Windsor, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 373 |  |  |
Initial Cost to Company, Land |  | $ 3,325,517 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 22,573,826 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,383,538 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,325,517 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,957,364 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 29,282,881 |  |  |
Accumulated Depreciation |  | (14,452,521) |  |  |
Investment in Real Estate Net |  | 14,830,360 |  |  |
Encumbrances |  | $ 0 |  |  |
Riverview Condominiums [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Norwalk, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 92 |  |  |
Initial Cost to Company, Land |  | $ 2,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,406,730 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,560,055 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 9,966,785 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 12,266,785 |  |  |
Accumulated Depreciation |  | (5,911,876) |  |  |
Investment in Real Estate Net |  | 6,354,909 |  |  |
Encumbrances |  | $ 0 |  |  |
Rolling Green (Milford) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Milford, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 304 |  |  |
Initial Cost to Company, Land |  | $ 2,012,350 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 13,452,150 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,536,428 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,012,350 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 19,988,578 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 22,000,928 |  |  |
Accumulated Depreciation |  | (11,602,104) |  |  |
Investment in Real Estate Net |  | 10,398,824 |  |  |
Encumbrances |  | $ 0 |  |  |
Rosecliff II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 130 |  |  |
Initial Cost to Company, Land |  | $ 4,922,840 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 30,202,160 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 668,021 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,922,840 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,870,181 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,793,021 |  |  |
Accumulated Depreciation |  | (6,606,758) |  |  |
Investment in Real Estate Net |  | 29,186,263 |  |  |
Encumbrances |  | $ 0 |  |  |
Sakura Crossing [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 230 |  |  |
Initial Cost to Company, Land |  | $ 14,641,990 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 42,858,010 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 516,747 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,641,990 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 43,374,757 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 58,016,747 |  |  |
Accumulated Depreciation |  | (10,000,868) |  |  |
Investment in Real Estate Net |  | 48,015,879 |  |  |
Encumbrances |  | $ 0 |  |  |
Seventh & James [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 96 |  |  |
Initial Cost to Company, Land |  | $ 663,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 5,974,803 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,738,122 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 663,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 9,712,925 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 10,376,725 |  |  |
Accumulated Depreciation |  | (6,665,425) |  |  |
Investment in Real Estate Net |  | 3,711,300 |  |  |
Encumbrances |  | $ 0 |  |  |
Sheffield Court [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 597 |  |  |
Initial Cost to Company, Land |  | $ 3,342,381 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 31,337,332 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 13,786,422 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,342,381 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 45,123,754 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,466,135 |  |  |
Accumulated Depreciation |  | (31,901,556) |  |  |
Investment in Real Estate Net |  | 16,564,579 |  |  |
Encumbrances |  | $ 0 |  |  |
Skycrest [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 264 |  |  |
Initial Cost to Company, Land |  | $ 10,560,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 25,574,457 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,534,401 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,560,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 28,108,858 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 38,668,858 |  |  |
Accumulated Depreciation |  | (15,040,496) |  |  |
Investment in Real Estate Net |  | 23,628,362 |  |  |
Encumbrances |  | $ 0 |  |  |
Skylark [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Union City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 174 |  |  |
Initial Cost to Company, Land |  | $ 1,781,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,731,916 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,437,547 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,781,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,169,463 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,951,063 |  |  |
Accumulated Depreciation |  | (11,666,506) |  |  |
Investment in Real Estate Net |  | 10,284,557 |  |  |
Encumbrances |  | $ 0 |  |  |
Skyline Terrace [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Burlingame, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 138 |  |  |
Initial Cost to Company, Land |  | $ 16,836,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 35,414,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,411,395 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,836,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,825,395 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 56,661,395 |  |  |
Accumulated Depreciation |  | (10,031,613) |  |  |
Investment in Real Estate Net |  | 46,629,782 |  |  |
Encumbrances |  | $ 0 |  |  |
Skyline Towers [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Falls Church, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 939 |  |  |
Initial Cost to Company, Land |  | $ 78,278,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 91,485,591 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 35,113,125 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 78,278,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 126,598,716 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 204,876,916 |  |  |
Accumulated Depreciation |  | (60,654,648) |  |  |
Investment in Real Estate Net |  | 144,222,268 |  |  |
Encumbrances |  | $ 0 |  |  |
SoMa II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 29,406,496 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 1,512,966 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 29,406,496 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 1,512,966 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,919,462 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 30,919,462 |  |  |
Encumbrances |  | $ 0 |  |  |
Sonterra at Foothill Ranch [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Foothill Ranch, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 300 |  |  |
Initial Cost to Company, Land |  | $ 7,503,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 24,048,507 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,091,719 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,503,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 28,140,226 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,643,626 |  |  |
Accumulated Depreciation |  | (16,219,354) |  |  |
Investment in Real Estate Net |  | 19,424,272 |  |  |
Encumbrances |  | $ 0 |  |  |
South City Station (fka South San Francisco) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 360 |  |  |
Initial Cost to Company, Land |  | $ 68,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 79,476,861 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,029,236 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 68,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 81,506,097 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 150,406,097 |  |  |
Accumulated Depreciation |  | (12,682,198) |  |  |
Investment in Real Estate Net |  | 137,723,899 |  |  |
Encumbrances |  | $ 0 |  |  |
South Winds [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Fall River, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 404 |  |  |
Initial Cost to Company, Land |  | $ 2,481,821 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,780,359 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,786,341 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,481,821 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,566,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 25,048,521 |  |  |
Accumulated Depreciation |  | (12,988,103) |  |  |
Investment in Real Estate Net |  | 12,060,418 |  |  |
Encumbrances |  | $ 0 |  |  |
Southwood [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Palo Alto, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 100 |  |  |
Initial Cost to Company, Land |  | $ 6,936,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,324,069 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,133,285 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,936,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 17,457,354 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 24,393,954 |  |  |
Accumulated Depreciation |  | (10,724,438) |  |  |
Investment in Real Estate Net |  | 13,669,516 |  |  |
Encumbrances |  | $ 0 |  |  |
Springbrook Estates [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Riverside, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 18,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 18,200,000 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 18,200,000 |  |  |
Encumbrances |  | $ 0 |  |  |
Square One [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 112 |  |  |
Initial Cost to Company, Land |  | $ 7,222,544 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,277,456 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 11,820 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,222,544 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,289,276 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,511,820 |  |  |
Accumulated Depreciation |  | (2,132,808) |  |  |
Investment in Real Estate Net |  | 31,379,012 |  |  |
Encumbrances |  | $ 0 |  |  |
Summerset Village II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chatsworth, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 260,646 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 260,646 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 260,646 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 260,646 |  |  |
Encumbrances |  | $ 0 |  |  |
Summit And Birch Hill [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Farmington, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 186 |  |  |
Initial Cost to Company, Land |  | $ 1,757,438 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 11,748,112 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,699,790 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,757,438 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,447,902 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,205,340 |  |  |
Accumulated Depreciation |  | (9,010,282) |  |  |
Investment in Real Estate Net |  | 8,195,058 |  |  |
Encumbrances |  | $ 0 |  |  |
Summit at Sausalito (fka Sausalito) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Sausalito, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 198 |  |  |
Initial Cost to Company, Land |  | $ 26,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 28,435,024 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,038,378 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 26,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 31,473,402 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 57,473,402 |  |  |
Accumulated Depreciation |  | (5,983,695) |  |  |
Investment in Real Estate Net |  | 51,489,707 |  |  |
Encumbrances |  | $ 0 |  |  |
Ten23 (fka 500 West 23rd Street) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 111 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 58,881,773 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 145,689 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 59,027,462 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 59,027,462 |  |  |
Accumulated Depreciation |  | (8,159,767) |  |  |
Investment in Real Estate Net |  | 50,867,695 |  |  |
Encumbrances |  | $ 0 |  |  |
Terraces, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 117 |  |  |
Initial Cost to Company, Land |  | $ 14,087,610 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,314,151 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 792,092 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,087,610 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 17,106,243 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 31,193,853 |  |  |
Accumulated Depreciation |  | (4,289,162) |  |  |
Investment in Real Estate Net |  | 26,904,691 |  |  |
Encumbrances |  | $ 0 |  |  |
Third Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 471 |  |  |
Initial Cost to Company, Land |  | $ 26,767,171 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 218,822,728 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,752,897 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 26,767,171 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 222,575,625 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 249,342,796 |  |  |
Accumulated Depreciation |  | (54,468,452) |  |  |
Investment in Real Estate Net |  | 194,874,344 |  |  |
Encumbrances |  | $ 0 |  |  |
Three20 [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 134 |  |  |
Initial Cost to Company, Land |  | $ 7,030,766 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,005,762 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 620,352 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,030,766 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,626,114 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 36,656,880 |  |  |
Accumulated Depreciation |  | (2,968,086) |  |  |
Investment in Real Estate Net |  | 33,688,794 |  |  |
Encumbrances |  | $ 0 |  |  |
Town Center South Commercial Tract [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | St. Charles, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 1,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,394 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 9,394 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 1,509,394 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 1,509,394 |  |  |
Encumbrances |  | $ 0 |  |  |
Town Square at Mark Center II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 272 |  |  |
Initial Cost to Company, Land |  | $ 15,568,464 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 55,029,607 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 891,715 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,568,464 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 55,921,322 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 71,489,786 |  |  |
Accumulated Depreciation |  | (15,215,629) |  |  |
Investment in Real Estate Net |  | 56,274,157 |  |  |
Encumbrances |  | $ 0 |  |  |
Trump Place, 140 Riverside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 354 |  |  |
Initial Cost to Company, Land |  | $ 103,539,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 94,082,725 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,016,383 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 103,539,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 99,099,108 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 202,638,208 |  |  |
Accumulated Depreciation |  | (37,252,860) |  |  |
Investment in Real Estate Net |  | 165,385,348 |  |  |
Encumbrances |  | $ 0 |  |  |
Trump Place, 160 Riverside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 455 |  |  |
Initial Cost to Company, Land |  | $ 139,933,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 190,964,745 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 11,256,618 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 139,933,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 202,221,363 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 342,154,863 |  |  |
Accumulated Depreciation |  | (74,504,178) |  |  |
Investment in Real Estate Net |  | 267,650,685 |  |  |
Encumbrances |  | $ 0 |  |  |
Trump Place, 180 Riverside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 516 |  |  |
Initial Cost to Company, Land |  | $ 144,968,250 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 138,346,681 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,992,673 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 144,968,250 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 148,339,354 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 293,307,604 |  |  |
Accumulated Depreciation |  | (56,241,522) |  |  |
Investment in Real Estate Net |  | 237,066,082 |  |  |
Encumbrances |  | $ 0 |  |  |
Urbana (fka Market Street Landing) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 287 |  |  |
Initial Cost to Company, Land |  | $ 12,542,418 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 74,480,619 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 269,601 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,542,418 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 74,750,220 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 87,292,638 |  |  |
Accumulated Depreciation |  | (6,439,418) |  |  |
Investment in Real Estate Net |  | 80,853,220 |  |  |
Encumbrances |  | $ 0 |  |  |
Uwajimaya Village [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 176 |  |  |
Initial Cost to Company, Land |  | $ 8,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 22,188,288 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 528,472 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,716,760 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 31,516,760 |  |  |
Accumulated Depreciation |  | (9,395,695) |  |  |
Investment in Real Estate Net |  | 22,121,065 |  |  |
Encumbrances |  | $ 0 |  |  |
Vantage Pointe [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 679 |  |  |
Initial Cost to Company, Land |  | $ 9,403,960 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 190,596,040 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,589,101 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,403,960 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 198,185,141 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 207,589,101 |  |  |
Accumulated Depreciation |  | (45,420,591) |  |  |
Investment in Real Estate Net |  | 162,168,510 |  |  |
Encumbrances |  | $ 0 |  |  |
Veloce [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 322 |  |  |
Initial Cost to Company, Land |  | $ 15,322,724 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 76,176,594 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 451,368 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,322,724 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 76,627,962 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 91,950,686 |  |  |
Accumulated Depreciation |  | (11,158,120) |  |  |
Investment in Real Estate Net |  | 80,792,566 |  |  |
Encumbrances |  | $ 0 |  |  |
Verde Condominium Homes (fka Mission Verde, LLC) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Jose, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 108 |  |  |
Initial Cost to Company, Land |  | $ 5,190,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,679,109 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,136,146 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,190,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 13,815,255 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 19,005,955 |  |  |
Accumulated Depreciation |  | (8,802,858) |  |  |
Investment in Real Estate Net |  | 10,203,097 |  |  |
Encumbrances |  | $ 0 |  |  |
Veridian (fka Silver Spring) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Silver Spring, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 457 |  |  |
Initial Cost to Company, Land |  | $ 18,539,817 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 130,407,365 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,610,778 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,539,817 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 132,018,143 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 150,557,960 |  |  |
Accumulated Depreciation |  | (29,933,549) |  |  |
Investment in Real Estate Net |  | 120,624,411 |  |  |
Encumbrances |  | $ 0 |  |  |
Villa Solana [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Laguna Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 272 |  |  |
Initial Cost to Company, Land |  | $ 1,665,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,985,678 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,240,278 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,665,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,225,956 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 25,891,056 |  |  |
Accumulated Depreciation |  | (17,544,510) |  |  |
Investment in Real Estate Net |  | 8,346,546 |  |  |
Encumbrances |  | $ 0 |  |  |
Village at Del Mar Heights, The (fka Del Mar Heights) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 168 |  |  |
Initial Cost to Company, Land |  | $ 15,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,859,396 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 452,196 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 41,311,592 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 56,411,592 |  |  |
Accumulated Depreciation |  | (6,269,124) |  |  |
Investment in Real Estate Net |  | 50,142,468 |  |  |
Encumbrances |  | $ 0 |  |  |
Virginia Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 231 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 85,940,003 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,314,664 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 88,254,667 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 88,254,667 |  |  |
Accumulated Depreciation |  | (12,224,720) |  |  |
Investment in Real Estate Net |  | 76,029,947 |  |  |
Encumbrances |  | $ 0 |  |  |
Vista 99 (fka Tasman) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Jose, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 27,709,329 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 163,443,672 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 27,709,329 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 163,443,672 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 191,153,001 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 191,153,001 |  |  |
Encumbrances |  | $ 0 |  |  |
Vista Del Lago [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Mission Viejo, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 608 |  |  |
Initial Cost to Company, Land |  | $ 4,525,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,736,293 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 15,916,279 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,525,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 56,652,572 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 61,178,372 |  |  |
Accumulated Depreciation |  | (41,596,423) |  |  |
Investment in Real Estate Net |  | 19,581,949 |  |  |
Encumbrances |  | $ 0 |  |  |
Vista on Courthouse [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 220 |  |  |
Initial Cost to Company, Land |  | $ 15,550,260 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 69,449,740 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,252,472 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,550,260 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 70,702,212 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 86,252,472 |  |  |
Accumulated Depreciation |  | (18,744,668) |  |  |
Investment in Real Estate Net |  | 67,507,804 |  |  |
Encumbrances |  | $ 0 |  |  |
Walden Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 232 |  |  |
Initial Cost to Company, Land |  | $ 12,448,888 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 52,044,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,777,135 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,448,888 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 55,821,583 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 68,270,471 |  |  |
Accumulated Depreciation |  | (12,955,477) |  |  |
Investment in Real Estate Net |  | 55,314,994 |  |  |
Encumbrances |  | $ 0 |  |  |
Watertown Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Watertown, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 134 |  |  |
Initial Cost to Company, Land |  | $ 16,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 34,074,056 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 492,605 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 34,566,661 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 51,366,661 |  |  |
Accumulated Depreciation |  | (5,057,515) |  |  |
Investment in Real Estate Net |  | 46,309,146 |  |  |
Encumbrances |  | $ 0 |  |  |
Webster Green [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Needham, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 77 |  |  |
Initial Cost to Company, Land |  | $ 1,418,893 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,485,006 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,325,106 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,418,893 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 10,810,112 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 12,229,005 |  |  |
Accumulated Depreciation |  | (5,911,293) |  |  |
Investment in Real Estate Net |  | 6,317,712 |  |  |
Encumbrances |  | $ 0 |  |  |
West 96th [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 207 |  |  |
Initial Cost to Company, Land |  | $ 84,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 67,055,502 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,339,801 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 84,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 69,395,303 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 154,195,303 |  |  |
Accumulated Depreciation |  | (12,819,335) |  |  |
Investment in Real Estate Net |  | 141,375,968 |  |  |
Encumbrances |  | $ 0 |  |  |
West End Apartments (fka Emerson Place/ CRP II) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 310 |  |  |
Initial Cost to Company, Land |  | $ 469,546 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 163,123,022 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,000,511 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 469,546 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 165,123,533 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 165,593,079 |  |  |
Accumulated Depreciation |  | (44,450,837) |  |  |
Investment in Real Estate Net |  | 121,142,242 |  |  |
Encumbrances |  | $ 0 |  |  |
Westchester at Rockville [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Rockville, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 192 |  |  |
Initial Cost to Company, Land |  | $ 10,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 44,135,207 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 361,408 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,496,615 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 55,096,615 |  |  |
Accumulated Depreciation |  | (6,548,905) |  |  |
Investment in Real Estate Net |  | 48,547,710 |  |  |
Encumbrances |  | $ 0 |  |  |
Westmont [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 163 |  |  |
Initial Cost to Company, Land |  | $ 64,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 61,143,259 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,305,267 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 64,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 62,448,526 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 127,348,526 |  |  |
Accumulated Depreciation |  | (10,006,114) |  |  |
Investment in Real Estate Net |  | 117,342,412 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 204 |  |  |
Initial Cost to Company, Land |  | $ 34,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 56,962,630 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,192,331 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 34,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 59,154,961 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 93,354,961 |  |  |
Accumulated Depreciation |  | (8,309,849) |  |  |
Investment in Real Estate Net |  | 85,045,112 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside Barrington (fka Westside Villas III) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 36 |  |  |
Initial Cost to Company, Land |  | $ 3,060,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 5,538,871 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 597,629 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,060,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,136,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 9,196,500 |  |  |
Accumulated Depreciation |  | (3,105,675) |  |  |
Investment in Real Estate Net |  | 6,090,825 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside Barry (fka Westside Villas VI) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 18 |  |  |
Initial Cost to Company, Land |  | $ 1,530,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,023,523 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 402,842 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,530,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 3,426,365 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 4,956,365 |  |  |
Accumulated Depreciation |  | (1,787,554) |  |  |
Investment in Real Estate Net |  | 3,168,811 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside Beloit (fka Westside Villas I) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 21 |  |  |
Initial Cost to Company, Land |  | $ 1,785,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,233,254 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 513,625 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,785,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 3,746,879 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 5,531,879 |  |  |
Accumulated Depreciation |  | (1,945,537) |  |  |
Investment in Real Estate Net |  | 3,586,342 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside Bundy (fka Westside Villas II) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 23 |  |  |
Initial Cost to Company, Land |  | $ 1,955,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,541,435 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 424,651 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,955,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 3,966,086 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 5,921,086 |  |  |
Accumulated Depreciation |  | (1,996,405) |  |  |
Investment in Real Estate Net |  | 3,924,681 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside Butler (fka Westside Villas IV) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 36 |  |  |
Initial Cost to Company, Land |  | $ 3,060,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 5,539,390 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 596,890 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,060,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,136,280 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 9,196,280 |  |  |
Accumulated Depreciation |  | (3,111,743) |  |  |
Investment in Real Estate Net |  | 6,084,537 |  |  |
Encumbrances |  | $ 0 |  |  |
Westside Villas (fka Westside Villas V & VII) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 113 |  |  |
Initial Cost to Company, Land |  | $ 9,605,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 19,983,385 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,877,050 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,605,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,860,435 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 31,465,435 |  |  |
Accumulated Depreciation |  | (10,577,308) |  |  |
Investment in Real Estate Net |  | 20,888,127 |  |  |
Encumbrances |  | $ 0 |  |  |
Westwood Glen [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Westwood, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 156 |  |  |
Initial Cost to Company, Land |  | $ 1,616,505 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 10,806,004 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,400,201 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,616,505 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 13,206,205 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 14,822,710 |  |  |
Accumulated Depreciation |  | (7,265,245) |  |  |
Investment in Real Estate Net |  | 7,557,465 |  |  |
Encumbrances |  | $ 0 |  |  |
Windridge (CA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Laguna Niguel, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 344 |  |  |
Initial Cost to Company, Land |  | $ 2,662,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,985,497 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,301,611 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,662,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,287,108 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,950,008 |  |  |
Accumulated Depreciation |  | (23,042,811) |  |  |
Investment in Real Estate Net |  | 12,907,197 |  |  |
Encumbrances |  | $ 0 |  |  |
Wood Creek I [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pleasant Hill, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 256 |  |  |
Initial Cost to Company, Land |  | $ 9,729,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,009,768 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,723,042 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,729,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,732,810 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 39,462,710 |  |  |
Accumulated Depreciation |  | (19,191,248) |  |  |
Investment in Real Estate Net |  | 20,271,462 |  |  |
Encumbrances |  | $ 0 |  |  |
Woodbridge (CT) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Newington, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 73 |  |  |
Initial Cost to Company, Land |  | $ 498,377 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 3,331,548 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,316,602 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 498,377 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 4,648,150 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 5,146,527 |  |  |
Accumulated Depreciation |  | (2,687,633) |  |  |
Investment in Real Estate Net |  | 2,458,894 |  |  |
Encumbrances |  | $ 0 |  |  |
Woodland Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | East Palo Alto, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 1,811 |  |  |
Initial Cost to Company, Land |  | $ 74,900,178 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 61,407,965 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 10,172,148 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 74,900,178 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 71,580,113 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 146,480,291 |  |  |
Accumulated Depreciation |  | (29,503,957) |  |  |
Investment in Real Estate Net |  | 116,976,334 |  |  |
Encumbrances |  | $ 0 |  |  |
Management Business [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chicago, IL |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 107,367,022 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 107,367,022 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 107,367,022 |  |  |
Accumulated Depreciation |  | (84,488,405) |  |  |
Investment in Real Estate Net |  | 22,878,617 |  |  |
Encumbrances |  | $ 0 |  |  |
Operating Partnership [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chicago, IL |  |  |
Real Estate And Accumulated Depreciation Units |  | 0 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 10,060,473 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 10,060,473 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 10,060,473 |  |  |
Accumulated Depreciation |  | 0 |  |  |
Investment in Real Estate Net |  | 10,060,473 |  |  |
Encumbrances |  | $ 0 |  |  |
Investment in Real Estate - Wholly Owned Unencumbered [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 52,513 |  |  |
Initial Cost to Company, Land |  | $ 4,495,508,075 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 12,087,293,175 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 855,011,332 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,495,508,075 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 12,942,304,507 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,437,812,582 |  |  |
Accumulated Depreciation |  | (3,224,397,212) |  |  |
Investment in Real Estate Net |  | 14,213,415,370 |  |  |
Encumbrances |  | $ 0 |  |  |
101 West End [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 506 |  |  |
Initial Cost to Company, Land |  | $ 190,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 131,374,708 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,576,456 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 190,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 133,951,164 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 324,551,164 |  |  |
Accumulated Depreciation |  | (24,450,561) |  |  |
Investment in Real Estate Net |  | 300,100,603 |  |  |
Encumbrances |  | $ 106,080,734 |  |  |
1401 Joyce On Pentagon Row [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 326 |  |  |
Initial Cost to Company, Land |  | $ 9,780,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 89,668,165 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,229,551 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,780,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 91,897,716 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 101,677,716 |  |  |
Accumulated Depreciation |  | (25,254,785) |  |  |
Investment in Real Estate Net |  | 76,422,931 |  |  |
Encumbrances |  | $ 57,428,472 |  |  |
2501 Porter [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 202 |  |  |
Initial Cost to Company, Land |  | $ 13,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 75,271,179 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,533,202 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 77,804,381 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 90,804,381 |  |  |
Accumulated Depreciation |  | (10,706,382) |  |  |
Investment in Real Estate Net |  | $ 80,097,999 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
300 East 39th (fka East 39th) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 254 |  |  |
Initial Cost to Company, Land |  | $ 48,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 96,174,639 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,477,085 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 48,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 97,651,724 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 146,551,724 |  |  |
Accumulated Depreciation |  | (14,652,321) |  |  |
Investment in Real Estate Net |  | 131,899,403 |  |  |
Encumbrances |  | $ 60,075,893 |  |  |
303 East 83rd (fka Camargue) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 261 |  |  |
Initial Cost to Company, Land |  | $ 79,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 79,122,624 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,412,483 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 79,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 80,535,107 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 159,935,107 |  |  |
Accumulated Depreciation |  | (13,348,028) |  |  |
Investment in Real Estate Net |  | $ 146,587,079 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
3003 Van Ness (fka Van Ness) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 625 |  |  |
Initial Cost to Company, Land |  | $ 56,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 141,191,580 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,859,298 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 56,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 144,050,878 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 200,350,878 |  |  |
Accumulated Depreciation |  | (22,215,124) |  |  |
Investment in Real Estate Net |  | $ 178,135,754 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (K) |  |  |
425 Broadway [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Santa Monica, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 101 |  |  |
Initial Cost to Company, Land |  | $ 12,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 34,394,772 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,594,856 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 35,989,628 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,589,628 |  |  |
Accumulated Depreciation |  | (4,950,823) |  |  |
Investment in Real Estate Net |  | $ 43,638,805 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
4701 Willard [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chevy Chase, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 517 |  |  |
Initial Cost to Company, Land |  | $ 76,921,130 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 153,947,682 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 27,665,480 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 76,921,130 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 181,613,162 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 258,534,292 |  |  |
Accumulated Depreciation |  | (32,880,043) |  |  |
Investment in Real Estate Net |  | 225,654,249 |  |  |
Encumbrances |  | $ 95,363,077 |  |  |
55 West Fifth I & II (fka Townhouse Plaza and Gardens) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Mateo, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 241 |  |  |
Initial Cost to Company, Land |  | $ 21,041,710 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 71,931,323 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 10,143,724 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 21,041,710 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 82,075,047 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 103,116,757 |  |  |
Accumulated Depreciation |  | (13,529,391) |  |  |
Investment in Real Estate Net |  | 89,587,366 |  |  |
Encumbrances |  | $ 28,269,109 |  |  |
77 Park Avenue (fka Hoboken) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Hoboken, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 301 |  |  |
Initial Cost to Company, Land |  | $ 27,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 168,992,440 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,529,188 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 27,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 172,521,628 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 200,421,628 |  |  |
Accumulated Depreciation |  | (22,319,468) |  |  |
Investment in Real Estate Net |  | $ 178,102,160 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (K) |  |  |
800 Sixth Ave (fka Chelsea) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 266 |  |  |
Initial Cost to Company, Land |  | $ 59,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 155,861,605 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 503,998 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 59,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 156,365,603 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 216,265,603 |  |  |
Accumulated Depreciation |  | (21,941,504) |  |  |
Investment in Real Estate Net |  | 194,324,099 |  |  |
Encumbrances |  | $ 77,542,253 |  |  |
929 Mass (fka 929 House) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 127 |  |  |
Initial Cost to Company, Land |  | $ 3,252,993 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,745,595 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,057,741 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,252,993 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 27,803,336 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 31,056,329 |  |  |
Accumulated Depreciation |  | (14,907,606) |  |  |
Investment in Real Estate Net |  | 16,148,723 |  |  |
Encumbrances |  | $ 1,408,857 |  |  |
Academy Village [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | North Hollywood, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 248 |  |  |
Initial Cost to Company, Land |  | $ 25,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,593,194 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,547,018 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 25,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 31,140,212 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 56,140,212 |  |  |
Accumulated Depreciation |  | (15,489,771) |  |  |
Investment in Real Estate Net |  | 40,650,441 |  |  |
Encumbrances |  | $ 20,000,000 |  |  |
Acappella [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 143 |  |  |
Initial Cost to Company, Land |  | $ 5,839,548 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,360,452 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,386,963 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,839,548 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,747,415 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 36,586,963 |  |  |
Accumulated Depreciation |  | (7,867,305) |  |  |
Investment in Real Estate Net |  | 28,719,658 |  |  |
Encumbrances |  | $ 19,548,601 |  |  |
Acton Courtyard [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 71 |  |  |
Initial Cost to Company, Land |  | $ 5,550,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 15,785,509 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 179,627 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,550,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,965,136 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,515,136 |  |  |
Accumulated Depreciation |  | (5,574,135) |  |  |
Investment in Real Estate Net |  | 15,941,001 |  |  |
Encumbrances |  | $ 9,920,000 |  |  |
Alborada [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Fremont, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 442 |  |  |
Initial Cost to Company, Land |  | $ 24,310,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 59,214,129 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,613,227 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 24,310,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 63,827,356 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 88,137,356 |  |  |
Accumulated Depreciation |  | (34,004,610) |  |  |
Investment in Real Estate Net |  | $ 54,132,746 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (I) |  |  |
Alcyone [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 161 |  |  |
Initial Cost to Company, Land |  | $ 11,379,497 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 49,360,503 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 312,223 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,379,497 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 49,672,726 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 61,052,223 |  |  |
Accumulated Depreciation |  | (3,589,789) |  |  |
Investment in Real Estate Net |  | 57,462,434 |  |  |
Encumbrances |  | $ 28,936,250 |  |  |
Arches, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Sunnyvale, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 410 |  |  |
Initial Cost to Company, Land |  | $ 26,650,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 62,850,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,070,248 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 26,650,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 63,920,248 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 90,570,248 |  |  |
Accumulated Depreciation |  | (15,872,496) |  |  |
Investment in Real Estate Net |  | $ 74,697,752 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Artech Building [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 21 |  |  |
Initial Cost to Company, Land |  | $ 1,642,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,152,518 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 307,744 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,642,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 9,460,262 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 11,102,262 |  |  |
Accumulated Depreciation |  | (3,049,419) |  |  |
Investment in Real Estate Net |  | 8,052,843 |  |  |
Encumbrances |  | $ 3,200,000 |  |  |
Artisan Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Northridge, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 140 |  |  |
Initial Cost to Company, Land |  | $ 7,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,537,359 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,156,962 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,694,321 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 28,694,321 |  |  |
Accumulated Depreciation |  | (9,975,656) |  |  |
Investment in Real Estate Net |  | 18,718,665 |  |  |
Encumbrances |  | $ 22,779,715 |  |  |
Avanti [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Anaheim, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 162 |  |  |
Initial Cost to Company, Land |  | $ 12,960,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,497,682 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,948,417 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,960,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,446,099 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,406,099 |  |  |
Accumulated Depreciation |  | (7,861,843) |  |  |
Investment in Real Estate Net |  | 25,544,256 |  |  |
Encumbrances |  | $ 18,169,458 |  |  |
Avenir [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 241 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 114,321,619 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 853,000 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 115,174,619 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 115,174,619 |  |  |
Accumulated Depreciation |  | (16,129,562) |  |  |
Investment in Real Estate Net |  | 99,045,057 |  |  |
Encumbrances |  | $ 92,869,154 |  |  |
Bachenheimer Building [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 44 |  |  |
Initial Cost to Company, Land |  | $ 3,439,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 13,866,379 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 136,057 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,439,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 14,002,436 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,441,436 |  |  |
Accumulated Depreciation |  | (4,681,558) |  |  |
Investment in Real Estate Net |  | 12,759,878 |  |  |
Encumbrances |  | $ 8,585,000 |  |  |
Bella Vista I, II, III Combined [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Woodland Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 579 |  |  |
Initial Cost to Company, Land |  | $ 31,682,754 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 121,095,786 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,202,259 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 31,682,754 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 124,298,045 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 155,980,799 |  |  |
Accumulated Depreciation |  | (45,159,303) |  |  |
Investment in Real Estate Net |  | 110,821,496 |  |  |
Encumbrances |  | $ 58,055,099 |  |  |
Berkeleyan [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 56 |  |  |
Initial Cost to Company, Land |  | $ 4,377,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,022,110 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 351,018 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,377,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 16,373,128 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 20,750,128 |  |  |
Accumulated Depreciation |  | (5,615,136) |  |  |
Investment in Real Estate Net |  | 15,134,992 |  |  |
Encumbrances |  | $ 8,290,000 |  |  |
Calvert Woodley [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 136 |  |  |
Initial Cost to Company, Land |  | $ 12,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 43,527,379 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,351,455 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,878,834 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 57,478,834 |  |  |
Accumulated Depreciation |  | (6,634,781) |  |  |
Investment in Real Estate Net |  | $ 50,844,053 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Carmel Terrace [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 384 |  |  |
Initial Cost to Company, Land |  | $ 2,288,300 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,596,281 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 10,947,605 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,288,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 31,543,886 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,832,186 |  |  |
Accumulated Depreciation |  | (24,139,928) |  |  |
Investment in Real Estate Net |  | $ 9,692,258 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Chelsea Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 113 |  |  |
Initial Cost to Company, Land |  | $ 3,397,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,289,074 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,938,442 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,397,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 11,227,516 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 14,624,616 |  |  |
Accumulated Depreciation |  | (6,785,484) |  |  |
Investment in Real Estate Net |  | 7,839,132 |  |  |
Encumbrances |  | $ 9,270,000 |  |  |
Citrus Suites [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Santa Monica, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 70 |  |  |
Initial Cost to Company, Land |  | $ 9,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,950,326 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 498,789 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 17,449,115 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 26,449,115 |  |  |
Accumulated Depreciation |  | (2,511,650) |  |  |
Investment in Real Estate Net |  | $ 23,937,465 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
CityView at Longwood [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 295 |  |  |
Initial Cost to Company, Land |  | $ 14,704,898 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 79,195,102 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,909,279 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,704,898 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 89,104,381 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 103,809,279 |  |  |
Accumulated Depreciation |  | (22,102,861) |  |  |
Investment in Real Estate Net |  | 81,706,418 |  |  |
Encumbrances |  | $ 22,813,347 |  |  |
Cleveland House [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 214 |  |  |
Initial Cost to Company, Land |  | $ 18,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 66,392,414 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,268,181 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 68,660,595 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 86,960,595 |  |  |
Accumulated Depreciation |  | (9,841,260) |  |  |
Investment in Real Estate Net |  | $ 77,119,335 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Columbia Crossing [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 247 |  |  |
Initial Cost to Company, Land |  | $ 23,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 53,045,073 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,133,914 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 55,178,987 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 78,678,987 |  |  |
Accumulated Depreciation |  | (8,468,042) |  |  |
Investment in Real Estate Net |  | $ 70,210,945 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Connecticut Heights [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 518 |  |  |
Initial Cost to Company, Land |  | $ 27,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 114,002,295 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,233,880 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 27,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 116,236,175 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 143,836,175 |  |  |
Accumulated Depreciation |  | (15,994,030) |  |  |
Investment in Real Estate Net |  | $ 127,842,145 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (K) |  |  |
Deerwood (SD) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 316 |  |  |
Initial Cost to Company, Land |  | $ 2,082,095 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,739,815 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 14,281,345 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,082,095 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,021,160 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,103,255 |  |  |
Accumulated Depreciation |  | (25,264,071) |  |  |
Investment in Real Estate Net |  | $ 9,839,184 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Del Mar Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 181 |  |  |
Initial Cost to Company, Land |  | $ 7,801,824 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 36,948,176 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,200,550 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,801,824 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 40,148,726 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 47,950,550 |  |  |
Accumulated Depreciation |  | (11,807,817) |  |  |
Investment in Real Estate Net |  | 36,142,733 |  |  |
Encumbrances |  | $ 23,789,381 |  |  |
Estancia at Santa Clara (fka Santa Clara) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Santa Clara, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 450 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 123,759,804 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 712,699 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 124,472,503 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 124,472,503 |  |  |
Accumulated Depreciation |  | (18,177,935) |  |  |
Investment in Real Estate Net |  | $ 106,294,568 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Fairchase [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Fairfax, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 392 |  |  |
Initial Cost to Company, Land |  | $ 23,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 87,722,321 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 486,155 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 88,208,476 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 111,708,476 |  |  |
Accumulated Depreciation |  | (12,420,764) |  |  |
Investment in Real Estate Net |  | $ 99,287,712 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Fairfield [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Stamford, CT |  |  |
Real Estate And Accumulated Depreciation Units |  | 263 |  |  |
Initial Cost to Company, Land |  | $ 6,510,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 39,690,120 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,807,773 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,510,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 46,497,893 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 53,008,093 |  |  |
Accumulated Depreciation |  | (29,297,448) |  |  |
Investment in Real Estate Net |  | 23,710,645 |  |  |
Encumbrances |  | $ 34,595,000 |  |  |
Fine Arts Building [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 100 |  |  |
Initial Cost to Company, Land |  | $ 7,817,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,462,772 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 322,852 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,817,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,785,624 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 34,602,624 |  |  |
Accumulated Depreciation |  | (9,099,586) |  |  |
Investment in Real Estate Net |  | 25,503,038 |  |  |
Encumbrances |  | $ 16,215,000 |  |  |
Flats at DuPont Circle [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units |  | 306 |  |  |
Initial Cost to Company, Land |  | $ 35,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 108,768,198 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 604,622 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 35,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 109,372,820 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 144,572,820 |  |  |
Accumulated Depreciation |  | (14,855,770) |  |  |
Investment in Real Estate Net |  | $ 129,717,050 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Gaia Building [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 91 |  |  |
Initial Cost to Company, Land |  | $ 7,113,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 25,623,826 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 234,336 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,113,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,858,162 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 32,971,162 |  |  |
Accumulated Depreciation |  | (8,785,368) |  |  |
Investment in Real Estate Net |  | 24,185,794 |  |  |
Encumbrances |  | $ 14,630,000 |  |  |
Gaithersburg Station [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Gaithersburg, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 389 |  |  |
Initial Cost to Company, Land |  | $ 17,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 74,678,917 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 395,060 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 75,073,977 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 92,573,977 |  |  |
Accumulated Depreciation |  | (9,661,514) |  |  |
Investment in Real Estate Net |  | 82,912,463 |  |  |
Encumbrances |  | $ 97,790,236 |  |  |
Glo [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 201 |  |  |
Initial Cost to Company, Land |  | $ 16,047,023 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 48,650,963 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 808,007 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,047,023 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 49,458,970 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 65,505,993 |  |  |
Accumulated Depreciation |  | (10,096,648) |  |  |
Investment in Real Estate Net |  | 55,409,345 |  |  |
Encumbrances |  | $ 32,088,033 |  |  |
Hathaway [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Long Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 385 |  |  |
Initial Cost to Company, Land |  | $ 2,512,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 22,611,912 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 8,120,060 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,512,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,731,972 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,244,472 |  |  |
Accumulated Depreciation |  | (21,884,752) |  |  |
Investment in Real Estate Net |  | 11,359,720 |  |  |
Encumbrances |  | $ 46,517,800 |  |  |
Heights on Capitol Hill [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 104 |  |  |
Initial Cost to Company, Land |  | $ 5,425,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,138,028 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 295,592 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,425,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,433,620 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 26,858,620 |  |  |
Accumulated Depreciation |  | (7,621,120) |  |  |
Investment in Real Estate Net |  | 19,237,500 |  |  |
Encumbrances |  | $ 28,180,585 |  |  |
Kelvin Court (fka Alta Pacific) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 132 |  |  |
Initial Cost to Company, Land |  | $ 10,752,145 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 34,628,115 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 387,734 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,752,145 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 35,015,849 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 45,767,994 |  |  |
Accumulated Depreciation |  | (9,542,049) |  |  |
Investment in Real Estate Net |  | 36,225,945 |  |  |
Encumbrances |  | $ 26,495,000 |  |  |
Kenwood Mews [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Burbank, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 141 |  |  |
Initial Cost to Company, Land |  | $ 14,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 24,662,883 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,351,321 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 28,014,204 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 42,114,204 |  |  |
Accumulated Depreciation |  | (10,515,075) |  |  |
Investment in Real Estate Net |  | $ 31,599,129 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
La Terrazza at Colma Station [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Colma, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 153 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 41,251,044 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 701,808 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 41,952,852 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 41,952,852 |  |  |
Accumulated Depreciation |  | (14,153,248) |  |  |
Investment in Real Estate Net |  | 27,799,604 |  |  |
Encumbrances |  | $ 25,175,000 |  |  |
Laguna Clara [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Santa Clara, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 264 |  |  |
Initial Cost to Company, Land |  | $ 13,642,420 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,707,475 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,533,141 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,642,420 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 34,240,616 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 47,883,036 |  |  |
Accumulated Depreciation |  | (15,885,790) |  |  |
Investment in Real Estate Net |  | $ 31,997,246 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Liberty Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Brain Tree, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 202 |  |  |
Initial Cost to Company, Land |  | $ 5,977,504 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,749,111 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,245,483 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,977,504 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 31,994,594 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 37,972,098 |  |  |
Accumulated Depreciation |  | (14,287,477) |  |  |
Investment in Real Estate Net |  | 23,684,621 |  |  |
Encumbrances |  | $ 24,980,280 |  |  |
Liberty Tower [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 235 |  |  |
Initial Cost to Company, Land |  | $ 16,382,822 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 83,817,078 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,351,073 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,382,822 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 85,168,151 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 101,550,973 |  |  |
Accumulated Depreciation |  | (20,623,905) |  |  |
Investment in Real Estate Net |  | 80,927,068 |  |  |
Encumbrances |  | $ 45,909,078 |  |  |
Longview Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Waltham, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 348 |  |  |
Initial Cost to Company, Land |  | $ 20,880,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 90,255,509 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,935,492 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 20,880,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 94,191,001 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 115,071,001 |  |  |
Accumulated Depreciation |  | (35,006,528) |  |  |
Investment in Real Estate Net |  | 80,064,473 |  |  |
Encumbrances |  | $ 60,073,423 |  |  |
Market Street Village [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 229 |  |  |
Initial Cost to Company, Land |  | $ 13,740,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,757,301 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,855,488 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,740,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 42,612,789 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 56,352,789 |  |  |
Accumulated Depreciation |  | (15,053,939) |  |  |
Investment in Real Estate Net |  | $ 41,298,850 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Metro on First [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 102 |  |  |
Initial Cost to Company, Land |  | $ 8,540,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 12,209,981 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 764,124 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,540,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 12,974,105 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,514,105 |  |  |
Accumulated Depreciation |  | (4,929,664) |  |  |
Investment in Real Estate Net |  | 16,584,441 |  |  |
Encumbrances |  | $ 22,843,410 |  |  |
Mill Creek [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Milpitas, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 516 |  |  |
Initial Cost to Company, Land |  | $ 12,858,693 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 57,168,503 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,621,842 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,858,693 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 64,790,345 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 77,649,038 |  |  |
Accumulated Depreciation |  | (28,371,508) |  |  |
Investment in Real Estate Net |  | 49,277,530 |  |  |
Encumbrances |  | $ 69,312,259 |  |  |
Moda [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 251 |  |  |
Initial Cost to Company, Land |  | $ 12,649,228 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 36,842,012 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 801,043 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,649,228 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,643,055 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 50,292,283 |  |  |
Accumulated Depreciation |  | (9,806,747) |  |  |
Investment in Real Estate Net |  | $ 40,485,536 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (M) |  |  |
Montierra (CA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 272 |  |  |
Initial Cost to Company, Land |  | $ 8,160,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,360,938 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,505,606 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,160,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 36,866,544 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 45,026,544 |  |  |
Accumulated Depreciation |  | (21,688,065) |  |  |
Investment in Real Estate Net |  | $ 23,338,479 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Mosaic at Metro [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Hyattsville, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 260 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 59,580,898 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 587,443 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 60,168,341 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 60,168,341 |  |  |
Accumulated Depreciation |  | (15,416,225) |  |  |
Investment in Real Estate Net |  | 44,752,116 |  |  |
Encumbrances |  | $ 42,865,814 |  |  |
North Pier at Harborside [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units |  | 297 |  |  |
Initial Cost to Company, Land |  | $ 4,000,159 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 94,290,590 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,769,431 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,000,159 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 97,060,021 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 101,060,180 |  |  |
Accumulated Depreciation |  | (39,300,172) |  |  |
Investment in Real Estate Net |  | $ 61,760,008 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (I) |  |  |
Oaks [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Santa Clarita, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 520 |  |  |
Initial Cost to Company, Land |  | $ 23,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 61,020,438 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,561,180 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 23,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 65,581,618 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 88,981,618 |  |  |
Accumulated Depreciation |  | (29,469,941) |  |  |
Investment in Real Estate Net |  | 59,511,677 |  |  |
Encumbrances |  | $ 35,967,006 |  |  |
Olympus Towers [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 328 |  |  |
Initial Cost to Company, Land |  | $ 14,752,034 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 73,335,425 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,047,844 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,752,034 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 80,383,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 95,135,303 |  |  |
Accumulated Depreciation |  | (33,557,234) |  |  |
Investment in Real Estate Net |  | 61,578,069 |  |  |
Encumbrances |  | $ 49,875,780 |  |  |
Park Place at San Mateo (fka San Mateo) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Mateo, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 575 |  |  |
Initial Cost to Company, Land |  | $ 71,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 211,907,141 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,896,968 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 71,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 218,804,109 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 290,704,109 |  |  |
Accumulated Depreciation |  | (30,601,516) |  |  |
Investment in Real Estate Net |  | $ 260,102,593 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Providence [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bothell, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 200 |  |  |
Initial Cost to Company, Land |  | $ 3,573,621 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 19,055,505 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,082,155 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,573,621 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,137,660 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 23,711,281 |  |  |
Accumulated Depreciation |  | (8,760,511) |  |  |
Investment in Real Estate Net |  | $ 14,950,770 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (I) |  |  |
Reserve at Clarendon Centre, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 252 |  |  |
Initial Cost to Company, Land |  | $ 10,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 52,812,935 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,001,480 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 56,814,415 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 67,314,415 |  |  |
Accumulated Depreciation |  | (24,499,908) |  |  |
Investment in Real Estate Net |  | $ 42,814,507 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Reserve at Eisenhower, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 226 |  |  |
Initial Cost to Company, Land |  | $ 6,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 34,585,060 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,518,215 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 36,103,275 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 42,603,275 |  |  |
Accumulated Depreciation |  | (16,514,637) |  |  |
Investment in Real Estate Net |  | $ 26,088,638 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Reserve at Empire Lakes [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Rancho Cucamonga, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 467 |  |  |
Initial Cost to Company, Land |  | $ 16,345,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 73,080,670 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,428,206 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 16,345,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 75,508,876 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 91,853,876 |  |  |
Accumulated Depreciation |  | (28,451,308) |  |  |
Investment in Real Estate Net |  | $ 63,402,568 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (I) |  |  |
Reserve at Fairfax Corners [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Fairfax, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 652 |  |  |
Initial Cost to Company, Land |  | $ 15,804,057 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 63,129,050 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,196,688 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,804,057 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 72,325,738 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 88,129,795 |  |  |
Accumulated Depreciation |  | (32,718,387) |  |  |
Investment in Real Estate Net |  | 55,411,408 |  |  |
Encumbrances |  | $ 84,778,876 |  |  |
Rianna II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 78 |  |  |
Initial Cost to Company, Land |  | $ 2,161,840 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,433,614 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 317,548 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,161,840 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 14,751,162 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 16,913,002 |  |  |
Accumulated Depreciation |  | (4,197,329) |  |  |
Investment in Real Estate Net |  | 12,715,673 |  |  |
Encumbrances |  | $ 9,428,447 |  |  |
Rockingham Glen [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | West Roxbury, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 143 |  |  |
Initial Cost to Company, Land |  | $ 1,124,217 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,515,160 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,290,553 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,124,217 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 9,805,713 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 10,929,930 |  |  |
Accumulated Depreciation |  | (5,551,551) |  |  |
Investment in Real Estate Net |  | 5,378,379 |  |  |
Encumbrances |  | $ 523,346 |  |  |
Siena Terrace [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Lake Forest, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 356 |  |  |
Initial Cost to Company, Land |  | $ 8,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 24,083,024 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,763,521 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,846,545 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 39,746,545 |  |  |
Accumulated Depreciation |  | (17,527,179) |  |  |
Investment in Real Estate Net |  | 22,219,366 |  |  |
Encumbrances |  | $ 38,440,808 |  |  |
Skyview [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Rancho Santa Margarita, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 260 |  |  |
Initial Cost to Company, Land |  | $ 3,380,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,952,863 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,360,171 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,380,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,313,034 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 29,693,034 |  |  |
Accumulated Depreciation |  | (14,316,970) |  |  |
Investment in Real Estate Net |  | 15,376,064 |  |  |
Encumbrances |  | $ 30,889,928 |  |  |
SoMa Square Apartments (fka South Market) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 410 |  |  |
Initial Cost to Company, Land |  | $ 79,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 177,316,977 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,252,808 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 79,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 181,569,785 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 261,469,785 |  |  |
Accumulated Depreciation |  | (25,190,244) |  |  |
Investment in Real Estate Net |  | $ 236,279,541 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Summerset Village [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chatsworth, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 280 |  |  |
Initial Cost to Company, Land |  | $ 2,629,804 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,670,889 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,129,137 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,629,804 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,800,026 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,429,830 |  |  |
Accumulated Depreciation |  | (19,917,548) |  |  |
Investment in Real Estate Net |  | 13,512,282 |  |  |
Encumbrances |  | $ 38,039,912 |  |  |
Talleyrand [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Tarrytown, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 300 |  |  |
Initial Cost to Company, Land |  | $ 12,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 49,838,160 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,916,190 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 54,754,350 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 66,754,350 |  |  |
Accumulated Depreciation |  | (27,823,399) |  |  |
Investment in Real Estate Net |  | 38,930,951 |  |  |
Encumbrances |  | $ 35,000,000 |  |  |
Teresina [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chula Vista, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 440 |  |  |
Initial Cost to Company, Land |  | $ 28,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 61,916,670 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,749,599 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 28,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 64,666,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 93,266,269 |  |  |
Accumulated Depreciation |  | (25,093,215) |  |  |
Investment in Real Estate Net |  | 68,173,054 |  |  |
Encumbrances |  | $ 40,302,570 |  |  |
Toscana [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 563 |  |  |
Initial Cost to Company, Land |  | $ 39,410,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 50,806,072 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 9,924,622 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 39,410,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 60,730,694 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 100,140,694 |  |  |
Accumulated Depreciation |  | (32,579,537) |  |  |
Investment in Real Estate Net |  | 67,561,157 |  |  |
Encumbrances |  | $ 71,243,194 |  |  |
Touriel Building [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 35 |  |  |
Initial Cost to Company, Land |  | $ 2,736,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,810,027 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 175,855 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,736,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 7,985,882 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 10,721,882 |  |  |
Accumulated Depreciation |  | (2,797,420) |  |  |
Investment in Real Estate Net |  | 7,924,462 |  |  |
Encumbrances |  | $ 5,050,000 |  |  |
Town Square at Mark Center I (fka Millbrook I) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 406 |  |  |
Initial Cost to Company, Land |  | $ 24,360,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 86,178,714 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,521,624 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 24,360,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 89,700,338 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 114,060,338 |  |  |
Accumulated Depreciation |  | (34,753,726) |  |  |
Investment in Real Estate Net |  | 79,306,612 |  |  |
Encumbrances |  | $ 77,353,222 |  |  |
Versailles [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Woodland Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 253 |  |  |
Initial Cost to Company, Land |  | $ 12,650,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,656,292 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,804,577 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,650,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,460,869 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 52,110,869 |  |  |
Accumulated Depreciation |  | (18,318,859) |  |  |
Investment in Real Estate Net |  | 33,792,010 |  |  |
Encumbrances |  | $ 30,372,953 |  |  |
Versailles (K-Town) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 225 |  |  |
Initial Cost to Company, Land |  | $ 10,590,975 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 44,409,025 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,300,111 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,590,975 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 45,709,136 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 56,300,111 |  |  |
Accumulated Depreciation |  | (12,641,215) |  |  |
Investment in Real Estate Net |  | 43,658,896 |  |  |
Encumbrances |  | $ 29,826,475 |  |  |
Victor on Venice [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 115 |  |  |
Initial Cost to Company, Land |  | $ 10,350,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 35,433,437 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 535,196 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,350,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 35,968,633 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 46,318,633 |  |  |
Accumulated Depreciation |  | (12,337,193) |  |  |
Investment in Real Estate Net |  | $ 33,981,440 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (J) |  |  |
Vintage [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Ontario, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 300 |  |  |
Initial Cost to Company, Land |  | $ 7,059,230 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 47,677,762 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 808,672 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,059,230 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 48,486,434 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 55,545,664 |  |  |
Accumulated Depreciation |  | (17,191,840) |  |  |
Investment in Real Estate Net |  | 38,353,824 |  |  |
Encumbrances |  | $ 33,000,000 |  |  |
Vintage at 425 Broadway (fka Promenade) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Santa Monica, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 58 |  |  |
Initial Cost to Company, Land |  | $ 9,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 13,961,523 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 539,897 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 14,501,420 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 23,501,420 |  |  |
Accumulated Depreciation |  | (2,424,132) |  |  |
Investment in Real Estate Net |  | $ 21,077,288 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (L) |  |  |
Water Park Towers [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 362 |  |  |
Initial Cost to Company, Land |  | $ 34,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 108,485,859 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,832,524 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 34,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 113,318,383 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 147,718,383 |  |  |
Accumulated Depreciation |  | (16,327,687) |  |  |
Investment in Real Estate Net |  | $ 131,390,696 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (K) |  |  |
West 54th [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units |  | 222 |  |  |
Initial Cost to Company, Land |  | $ 60,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 48,193,837 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 605,010 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 60,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 48,798,847 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 109,698,847 |  |  |
Accumulated Depreciation |  | (9,079,353) |  |  |
Investment in Real Estate Net |  | 100,619,494 |  |  |
Encumbrances |  | $ 47,327,897 |  |  |
Westgate (fka Westgate I) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 480 |  |  |
Initial Cost to Company, Land |  | $ 22,898,848 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 133,559,573 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 808,874 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 22,898,848 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 134,368,447 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 157,267,295 |  |  |
Accumulated Depreciation |  | (23,243,923) |  |  |
Investment in Real Estate Net |  | 134,023,372 |  |  |
Encumbrances |  | $ 96,935,000 |  |  |
Woodleaf [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Campbell, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 178 |  |  |
Initial Cost to Company, Land |  | $ 8,550,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,988,183 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,380,543 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,550,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,368,726 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 29,919,326 |  |  |
Accumulated Depreciation |  | (12,368,124) |  |  |
Investment in Real Estate Net |  | 17,551,202 |  |  |
Encumbrances |  | $ 17,858,854 |  |  |
Investment in Real Estate - Wholly Owned Encumbered [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 23,686 |  |  |
Initial Cost to Company, Land |  | $ 1,688,383,769 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 5,069,221,671 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 297,359,218 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,688,383,769 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 5,366,580,889 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 7,054,964,658 |  |  |
Accumulated Depreciation |  | (1,464,311,726) |  |  |
Investment in Real Estate Net |  | 5,590,652,932 |  |  |
Encumbrances |  | $ 4,220,456,586 |  |  |
2300 Elliott [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 92 |  |  |
Initial Cost to Company, Land |  | $ 796,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,173,725 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,320,524 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 796,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 13,494,249 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 14,291,049 |  |  |
Accumulated Depreciation |  | (10,068,231) |  |  |
Investment in Real Estate Net |  | 4,222,818 |  |  |
Encumbrances |  | $ 0 |  |  |
Canyon Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 162 |  |  |
Initial Cost to Company, Land |  | $ 4,869,448 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 11,955,064 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,497,193 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,869,448 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 15,452,257 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 20,321,705 |  |  |
Accumulated Depreciation |  | (9,266,022) |  |  |
Investment in Real Estate Net |  | 11,055,683 |  |  |
Encumbrances |  | $ 0 |  |  |
Country Oaks [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Agoura Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 256 |  |  |
Initial Cost to Company, Land |  | $ 6,105,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,561,865 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,290,585 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,105,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 34,852,450 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 40,957,450 |  |  |
Accumulated Depreciation |  | (16,944,551) |  |  |
Investment in Real Estate Net |  | 24,012,899 |  |  |
Encumbrances |  | $ 0 |  |  |
Fox Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Englewood, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 300 |  |  |
Initial Cost to Company, Land |  | $ 2,490,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 17,522,114 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,823,697 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,490,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,345,811 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 24,835,811 |  |  |
Accumulated Depreciation |  | (12,642,142) |  |  |
Investment in Real Estate Net |  | 12,193,669 |  |  |
Encumbrances |  | $ 0 |  |  |
Monterra in Mill Creek [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Mill Creek, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 139 |  |  |
Initial Cost to Company, Land |  | $ 2,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 13,255,123 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 787,359 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 14,042,482 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 16,842,482 |  |  |
Accumulated Depreciation |  | (5,598,815) |  |  |
Investment in Real Estate Net |  | 11,243,667 |  |  |
Encumbrances |  | $ 0 |  |  |
Rosecliff [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units |  | 156 |  |  |
Initial Cost to Company, Land |  | $ 5,460,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 15,721,570 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,934,091 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,460,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,655,661 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 24,115,661 |  |  |
Accumulated Depreciation |  | (10,612,838) |  |  |
Investment in Real Estate Net |  | 13,502,823 |  |  |
Encumbrances |  | $ 0 |  |  |
Strayhorse at Arrowhead Ranch [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Glendale, AZ |  |  |
Real Estate And Accumulated Depreciation Units |  | 136 |  |  |
Initial Cost to Company, Land |  | $ 4,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 12,968,002 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 627,934 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 13,595,936 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,995,936 |  |  |
Accumulated Depreciation |  | (5,287,150) |  |  |
Investment in Real Estate Net |  | 12,708,786 |  |  |
Encumbrances |  | $ 0 |  |  |
Via Ventura (CA) (fka Ventura) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Ventura, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 192 |  |  |
Initial Cost to Company, Land |  | $ 8,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 44,308,202 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 542,226 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,850,428 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 53,450,428 |  |  |
Accumulated Depreciation |  | (7,114,728) |  |  |
Investment in Real Estate Net |  | 46,335,700 |  |  |
Encumbrances |  | $ 0 |  |  |
Wood Creek II (fka Willow Brook (CA)) |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pleasant Hill, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 228 |  |  |
Initial Cost to Company, Land |  | $ 5,055,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 38,388,672 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,892,178 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,055,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 44,280,850 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 49,335,850 |  |  |
Accumulated Depreciation |  | (18,496,598) |  |  |
Investment in Real Estate Net |  | 30,839,252 |  |  |
Encumbrances |  | $ 0 |  |  |
Investment in Real Estate - Partially Owned Unencumbered [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 1,661 |  |  |
Initial Cost to Company, Land |  | $ 40,576,248 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 190,854,337 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 30,715,787 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 40,576,248 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 221,570,124 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 262,146,372 |  |  |
Accumulated Depreciation |  | (96,031,075) |  |  |
Investment in Real Estate Net |  | 166,115,297 |  |  |
Encumbrances |  | $ 0 |  |  |
Bellevue Meadows [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 180 |  |  |
Initial Cost to Company, Land |  | $ 4,507,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 12,574,814 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,683,238 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,507,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 17,258,052 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,765,152 |  |  |
Accumulated Depreciation |  | (11,286,126) |  |  |
Investment in Real Estate Net |  | 10,479,026 |  |  |
Encumbrances |  | $ 16,538,000 |  |  |
Canyon Creek (CA) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | San Ramon, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 268 |  |  |
Initial Cost to Company, Land |  | $ 5,425,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,812,121 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,531,309 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,425,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,343,430 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,768,430 |  |  |
Accumulated Depreciation |  | (13,863,495) |  |  |
Investment in Real Estate Net |  | 16,904,935 |  |  |
Encumbrances |  | $ 28,200,000 |  |  |
Harrison Square (fka Elliot Bay) [Domain] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 166 |  |  |
Initial Cost to Company, Land |  | $ 7,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 35,844,345 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,610,519 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 40,454,864 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,054,864 |  |  |
Accumulated Depreciation |  | (5,597,458) |  |  |
Investment in Real Estate Net |  | $ 42,457,406 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | [1] | (K) |  |  |
Isle at Arrowhead Ranch [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Glendale, AZ |  |  |
Real Estate And Accumulated Depreciation Units |  | 256 |  |  |
Initial Cost to Company, Land |  | $ 1,650,237 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 19,593,123 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,399,270 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,650,237 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,992,393 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 23,642,630 |  |  |
Accumulated Depreciation |  | (13,781,305) |  |  |
Investment in Real Estate Net |  | 9,861,325 |  |  |
Encumbrances |  | $ 17,700,000 |  |  |
Lantern Cove [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Foster City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 232 |  |  |
Initial Cost to Company, Land |  | $ 6,945,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,064,976 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,882,314 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,945,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 28,947,290 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,892,290 |  |  |
Accumulated Depreciation |  | (14,983,809) |  |  |
Investment in Real Estate Net |  | 20,908,481 |  |  |
Encumbrances |  | $ 36,455,000 |  |  |
Schooner Bay I [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Foster City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 168 |  |  |
Initial Cost to Company, Land |  | $ 5,345,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,390,618 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,890,277 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,345,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,280,895 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,625,895 |  |  |
Accumulated Depreciation |  | (13,022,386) |  |  |
Investment in Real Estate Net |  | 17,603,509 |  |  |
Encumbrances |  | $ 28,870,000 |  |  |
Schooner Bay II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Foster City, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 144 |  |  |
Initial Cost to Company, Land |  | $ 4,550,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,064,764 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,365,840 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,550,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,430,604 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 26,980,604 |  |  |
Accumulated Depreciation |  | (11,706,487) |  |  |
Investment in Real Estate Net |  | 15,274,117 |  |  |
Encumbrances |  | $ 26,175,000 |  |  |
Surrey Downs [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 122 |  |  |
Initial Cost to Company, Land |  | $ 3,057,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,848,618 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,498,023 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,057,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 10,346,641 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 13,403,741 |  |  |
Accumulated Depreciation |  | (6,441,879) |  |  |
Investment in Real Estate Net |  | 6,961,862 |  |  |
Encumbrances |  | $ 9,829,000 |  |  |
Virgil Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 142 |  |  |
Initial Cost to Company, Land |  | $ 5,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 15,216,613 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,643,870 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 17,860,483 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 23,360,483 |  |  |
Accumulated Depreciation |  | (7,233,630) |  |  |
Investment in Real Estate Net |  | 16,126,853 |  |  |
Encumbrances |  | $ 9,900,000 |  |  |
Wisconsin Place [Domain] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Chevy Chase, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 432 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 172,089,355 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 844,523 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 172,933,878 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 172,933,878 |  |  |
Accumulated Depreciation |  | (22,749,424) |  |  |
Investment in Real Estate Net |  | 150,184,454 |  |  |
Encumbrances |  | 145,538,053 |  |  |
Portfolio Entity Encumbrances [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | $ 2,112,400,525 |  |  |
Investment in Real Estate - Partially Owned Encumbered [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 2,110 |  |  |
Initial Cost to Company, Land |  | $ 44,579,437 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 343,499,347 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 39,349,183 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 44,579,437 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 382,848,530 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 427,427,967 |  |  |
Accumulated Depreciation |  | (120,665,999) |  |  |
Investment in Real Estate Net |  | 306,761,968 |  |  |
Encumbrances |  | $ 343,428,578 |  |  |
Total Consolidated Investment in Real Estate [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 79,970 |  |  |
Initial Cost to Company, Land |  | $ 6,269,047,529 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 17,690,868,530 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,222,435,520 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,269,047,529 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,913,304,050 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 25,182,351,579 |  |  |
Accumulated Depreciation |  | (4,905,406,012) |  |  |
Investment in Real Estate Net |  | 20,276,945,567 |  |  |
Encumbrances |  | $ 4,563,885,164 |  |  |
Ashton, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Corona Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 492 |  |  |
Initial Cost to Company, Land |  | $ 2,594,264 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,042,397 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,170,917 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,594,264 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 40,213,314 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 42,807,578 |  |  |
Accumulated Depreciation |  | (26,113,974) |  |  |
Investment in Real Estate Net |  | 16,693,604 |  |  |
Encumbrances |  | $ 0 |  |  |
Ball Park Lofts [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 354 |  |  |
Initial Cost to Company, Land |  | $ 5,481,556 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 51,658,741 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,998,907 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,481,556 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 56,657,648 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 62,139,204 |  |  |
Accumulated Depreciation |  | (23,327,439) |  |  |
Investment in Real Estate Net |  | 38,811,765 |  |  |
Encumbrances |  | $ 0 |  |  |
Belle Terra [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Mukilteo, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 235 |  |  |
Initial Cost to Company, Land |  | $ 5,686,861 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,070,540 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,295,675 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,686,861 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 27,366,215 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 33,053,076 |  |  |
Accumulated Depreciation |  | (11,731,682) |  |  |
Investment in Real Estate Net |  | 21,321,394 |  |  |
Encumbrances |  | $ 0 |  |  |
Brookside (CO) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boulder, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 144 |  |  |
Initial Cost to Company, Land |  | $ 3,600,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 10,211,159 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,816,110 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,600,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 13,027,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 16,627,669 |  |  |
Accumulated Depreciation |  | (7,756,394) |  |  |
Investment in Real Estate Net |  | 8,871,275 |  |  |
Encumbrances |  | $ 0 |  |  |
Canterbury [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Germantown, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 544 |  |  |
Initial Cost to Company, Land |  | $ 2,781,300 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 32,942,531 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 15,962,268 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,781,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 48,904,799 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 51,686,099 |  |  |
Accumulated Depreciation |  | (35,090,051) |  |  |
Investment in Real Estate Net |  | 16,596,048 |  |  |
Encumbrances |  | $ 0 |  |  |
Cierra Crest [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 480 |  |  |
Initial Cost to Company, Land |  | $ 4,803,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 34,894,898 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,013,381 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,803,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 40,908,279 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 45,711,379 |  |  |
Accumulated Depreciation |  | (25,673,488) |  |  |
Investment in Real Estate Net |  | 20,037,891 |  |  |
Encumbrances |  | $ 0 |  |  |
Coconut Palm Club [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coconut Creek, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 301 |  |  |
Initial Cost to Company, Land |  | $ 3,001,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 17,678,928 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,535,698 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,001,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 22,214,626 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 25,216,326 |  |  |
Accumulated Depreciation |  | (13,648,954) |  |  |
Investment in Real Estate Net |  | 11,567,372 |  |  |
Encumbrances |  | $ 0 |  |  |
Colorado Pointe [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 193 |  |  |
Initial Cost to Company, Land |  | $ 5,790,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 28,815,607 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 841,854 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,790,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,657,461 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 35,447,461 |  |  |
Accumulated Depreciation |  | (11,304,894) |  |  |
Investment in Real Estate Net |  | 24,142,567 |  |  |
Encumbrances |  | $ 0 |  |  |
Copper Canyon [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Highlands Ranch, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 222 |  |  |
Initial Cost to Company, Land |  | $ 1,442,212 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,251,114 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,889,129 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,442,212 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,140,243 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 19,582,455 |  |  |
Accumulated Depreciation |  | (10,551,851) |  |  |
Investment in Real Estate Net |  | 9,030,604 |  |  |
Encumbrances |  | $ 0 |  |  |
Cove at Boynton Beach I [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boynton Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 252 |  |  |
Initial Cost to Company, Land |  | $ 12,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 31,469,651 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,894,856 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,364,507 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 49,964,507 |  |  |
Accumulated Depreciation |  | (16,614,767) |  |  |
Investment in Real Estate Net |  | 33,349,740 |  |  |
Encumbrances |  | $ 0 |  |  |
Cove at Boynton Beach II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boynton Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 296 |  |  |
Initial Cost to Company, Land |  | $ 14,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 37,874,719 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 0 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 14,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,874,719 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 52,674,719 |  |  |
Accumulated Depreciation |  | (15,535,094) |  |  |
Investment in Real Estate Net |  | 37,139,625 |  |  |
Encumbrances |  | $ 0 |  |  |
Dartmouth Woods [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Lakewood, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 201 |  |  |
Initial Cost to Company, Land |  | $ 1,609,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 10,832,754 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,604,325 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,609,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 13,437,079 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 15,046,879 |  |  |
Accumulated Depreciation |  | (8,898,931) |  |  |
Investment in Real Estate Net |  | 6,147,948 |  |  |
Encumbrances |  | $ 0 |  |  |
Deerwood (Corona) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Corona, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 316 |  |  |
Initial Cost to Company, Land |  | $ 4,742,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,272,892 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,574,232 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,742,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,847,124 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 29,589,324 |  |  |
Accumulated Depreciation |  | (16,204,547) |  |  |
Investment in Real Estate Net |  | 13,384,777 |  |  |
Encumbrances |  | $ 0 |  |  |
Enclave at Waterways [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Deerfield Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 300 |  |  |
Initial Cost to Company, Land |  | $ 15,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 33,194,576 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,148,558 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 35,343,134 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 50,343,134 |  |  |
Accumulated Depreciation |  | (14,572,103) |  |  |
Investment in Real Estate Net |  | 35,771,031 |  |  |
Encumbrances |  | $ 0 |  |  |
Enclave at Winston Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coconut Creek, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 278 |  |  |
Initial Cost to Company, Land |  | $ 5,560,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 19,939,324 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,738,870 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,560,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,678,194 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 31,238,194 |  |  |
Accumulated Depreciation |  | (12,419,692) |  |  |
Investment in Real Estate Net |  | 18,818,502 |  |  |
Encumbrances |  | $ 0 |  |  |
Estates at Tanglewood [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Westminster, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 504 |  |  |
Initial Cost to Company, Land |  | $ 7,560,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 51,256,538 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,230,043 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 7,560,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 54,486,581 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 62,046,581 |  |  |
Accumulated Depreciation |  | (21,626,401) |  |  |
Investment in Real Estate Net |  | 40,420,180 |  |  |
Encumbrances |  | $ 0 |  |  |
Estates at Wellington Green [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Wellington, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 400 |  |  |
Initial Cost to Company, Land |  | $ 20,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 64,790,850 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,718,719 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 20,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 67,509,569 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 87,509,569 |  |  |
Accumulated Depreciation |  | (26,657,478) |  |  |
Investment in Real Estate Net |  | 60,852,091 |  |  |
Encumbrances |  | $ 0 |  |  |
Gables Grand Plaza [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coral Gables, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 195 |  |  |
Initial Cost to Company, Land |  | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 44,601,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,472,911 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 52,073,911 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 52,073,911 |  |  |
Accumulated Depreciation |  | (22,657,292) |  |  |
Investment in Real Estate Net |  | 29,416,619 |  |  |
Encumbrances |  | $ 0 |  |  |
Gatehouse at Pine Lake [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pembroke Pines, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 296 |  |  |
Initial Cost to Company, Land |  | $ 1,896,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 17,070,795 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,166,800 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,896,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,237,595 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 26,134,195 |  |  |
Accumulated Depreciation |  | (15,313,088) |  |  |
Investment in Real Estate Net |  | 10,821,107 |  |  |
Encumbrances |  | $ 0 |  |  |
Gatehouse on the Green [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Plantation, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 312 |  |  |
Initial Cost to Company, Land |  | $ 2,228,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,056,270 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 8,683,372 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,228,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 28,739,642 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,967,842 |  |  |
Accumulated Depreciation |  | (18,755,567) |  |  |
Investment in Real Estate Net |  | 12,212,275 |  |  |
Encumbrances |  | $ 0 |  |  |
Governors Green [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bowie, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 478 |  |  |
Initial Cost to Company, Land |  | $ 19,845,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 73,335,916 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,718,594 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 19,845,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 75,054,510 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 94,899,510 |  |  |
Accumulated Depreciation |  | (25,022,239) |  |  |
Investment in Real Estate Net |  | 69,877,271 |  |  |
Encumbrances |  | $ 0 |  |  |
Greenwood Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Centennial, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 291 |  |  |
Initial Cost to Company, Land |  | $ 4,365,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 38,372,440 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,824,526 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,365,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 43,196,966 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 47,561,966 |  |  |
Accumulated Depreciation |  | (14,493,439) |  |  |
Investment in Real Estate Net |  | 33,068,527 |  |  |
Encumbrances |  | $ 0 |  |  |
Greenwood Plaza [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Centennial, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 266 |  |  |
Initial Cost to Company, Land |  | $ 3,990,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 35,846,708 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,827,653 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,990,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 39,674,361 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 43,664,361 |  |  |
Accumulated Depreciation |  | (13,920,511) |  |  |
Investment in Real Estate Net |  | 29,743,850 |  |  |
Encumbrances |  | $ 0 |  |  |
Hammocks Place [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Miami, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 296 |  |  |
Initial Cost to Company, Land |  | $ 319,180 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 12,513,467 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,386,783 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 319,180 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,900,250 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 19,219,430 |  |  |
Accumulated Depreciation |  | (13,303,869) |  |  |
Investment in Real Estate Net |  | 5,915,561 |  |  |
Encumbrances |  | $ 0 |  |  |
Heronfield [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Kirkland, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 202 |  |  |
Initial Cost to Company, Land |  | $ 9,245,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 27,017,749 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,960,441 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 9,245,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,978,190 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 40,223,190 |  |  |
Accumulated Depreciation |  | (10,665,598) |  |  |
Investment in Real Estate Net |  | 29,557,592 |  |  |
Encumbrances |  | $ 0 |  |  |
Huntington Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Everett, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 381 |  |  |
Initial Cost to Company, Land |  | $ 1,597,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 14,367,864 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,651,504 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,597,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,019,368 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 21,616,868 |  |  |
Accumulated Depreciation |  | (14,833,511) |  |  |
Investment in Real Estate Net |  | 6,783,357 |  |  |
Encumbrances |  | $ 0 |  |  |
Kings Colony (FL) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Miami, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 480 |  |  |
Initial Cost to Company, Land |  | $ 19,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 48,379,586 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,396,307 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 19,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 55,775,893 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 74,975,893 |  |  |
Accumulated Depreciation |  | (21,996,506) |  |  |
Investment in Real Estate Net |  | 52,979,387 |  |  |
Encumbrances |  | $ 0 |  |  |
Landings at Pembroke Lakes [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pembroke Pines, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 358 |  |  |
Initial Cost to Company, Land |  | $ 17,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 24,460,989 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,536,019 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 29,997,008 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 47,897,008 |  |  |
Accumulated Depreciation |  | (14,056,557) |  |  |
Investment in Real Estate Net |  | 33,840,451 |  |  |
Encumbrances |  | $ 0 |  |  |
Legacy at Highlands Ranch [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Highlands Ranch, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 422 |  |  |
Initial Cost to Company, Land |  | $ 6,330,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 37,557,013 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,837,915 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,330,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 40,394,928 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 46,724,928 |  |  |
Accumulated Depreciation |  | (16,768,231) |  |  |
Investment in Real Estate Net |  | 29,956,697 |  |  |
Encumbrances |  | $ 0 |  |  |
Marquessa [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Corona Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units |  | 336 |  |  |
Initial Cost to Company, Land |  | $ 6,888,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 21,604,584 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,578,245 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,888,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,182,829 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 32,071,329 |  |  |
Accumulated Depreciation |  | (16,010,773) |  |  |
Investment in Real Estate Net |  | 16,060,556 |  |  |
Encumbrances |  | $ 0 |  |  |
Martine, The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 67 |  |  |
Initial Cost to Company, Land |  | $ 3,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 9,616,264 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,314,595 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 12,930,859 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 16,130,859 |  |  |
Accumulated Depreciation |  | (5,125,452) |  |  |
Investment in Real Estate Net |  | 11,005,407 |  |  |
Encumbrances |  | $ 0 |  |  |
Midtown 24 [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Plantation, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 248 |  |  |
Initial Cost to Company, Land |  | $ 10,129,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 58,770,100 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,836,209 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,129,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 60,606,309 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 70,736,209 |  |  |
Accumulated Depreciation |  | (13,083,451) |  |  |
Investment in Real Estate Net |  | 57,652,758 |  |  |
Encumbrances |  | $ 0 |  |  |
Miramar Lakes [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Miramar, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 344 |  |  |
Initial Cost to Company, Land |  | $ 17,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 51,487,235 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,701,577 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 54,188,812 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 71,388,812 |  |  |
Accumulated Depreciation |  | (20,915,774) |  |  |
Investment in Real Estate Net |  | 50,473,038 |  |  |
Encumbrances |  | $ 0 |  |  |
Mosaic at Largo Station [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Hyattsville, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 242 |  |  |
Initial Cost to Company, Land |  | $ 4,120,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 42,477,297 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 733,047 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,120,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 43,210,344 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 47,331,144 |  |  |
Accumulated Depreciation |  | (12,991,703) |  |  |
Investment in Real Estate Net |  | 34,339,441 |  |  |
Encumbrances |  | $ 0 |  |  |
New River Cove [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Davie, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 316 |  |  |
Initial Cost to Company, Land |  | $ 15,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 46,142,895 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,122,060 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 50,264,955 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 66,064,955 |  |  |
Accumulated Depreciation |  | (18,729,270) |  |  |
Investment in Real Estate Net |  | 47,335,685 |  |  |
Encumbrances |  | $ 0 |  |  |
Northlake (MD) [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Germantown, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 304 |  |  |
Initial Cost to Company, Land |  | $ 15,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,142,302 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 10,395,369 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 33,537,671 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,537,671 |  |  |
Accumulated Depreciation |  | (17,973,600) |  |  |
Investment in Real Estate Net |  | 30,564,071 |  |  |
Encumbrances |  | $ 0 |  |  |
Oak Mill One [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Germantown, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 208 |  |  |
Initial Cost to Company, Land |  | $ 10,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 13,155,522 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,759,098 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 10,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 20,914,620 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 30,914,620 |  |  |
Accumulated Depreciation |  | (11,568,469) |  |  |
Investment in Real Estate Net |  | 19,346,151 |  |  |
Encumbrances |  | $ 0 |  |  |
Oaks at Falls Church [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Falls Church, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 176 |  |  |
Initial Cost to Company, Land |  | $ 20,240,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,152,616 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 4,074,265 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 20,240,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 24,226,881 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 44,466,881 |  |  |
Accumulated Depreciation |  | (10,342,378) |  |  |
Investment in Real Estate Net |  | 34,124,503 |  |  |
Encumbrances |  | $ 0 |  |  |
Oasis at Delray Beach I [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Delray Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 196 |  |  |
Initial Cost to Company, Land |  | $ 5,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 25,150,766 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,433,675 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 26,584,441 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 32,484,441 |  |  |
Accumulated Depreciation |  | (4,654,230) |  |  |
Investment in Real Estate Net |  | 27,830,211 |  |  |
Encumbrances |  | $ 0 |  |  |
Oasis at Delray Beach II [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Delray Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 128 |  |  |
Initial Cost to Company, Land |  | $ 3,840,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 18,144,955 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 20,701 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,840,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 18,165,656 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 22,005,656 |  |  |
Accumulated Depreciation |  | (1,983,415) |  |  |
Investment in Real Estate Net |  | 20,022,241 |  |  |
Encumbrances |  | $ 0 |  |  |
Orchard Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Lynnwood, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 104 |  |  |
Initial Cost to Company, Land |  | $ 480,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 4,372,033 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,713,611 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 480,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 6,085,644 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 6,566,244 |  |  |
Accumulated Depreciation |  | (4,401,110) |  |  |
Investment in Real Estate Net |  | 2,165,134 |  |  |
Encumbrances |  | $ 0 |  |  |
Palm Trace Landings [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Davie, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 768 |  |  |
Initial Cost to Company, Land |  | $ 38,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 105,693,432 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,925,125 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 38,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 111,618,557 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 150,018,557 |  |  |
Accumulated Depreciation |  | (42,732,227) |  |  |
Investment in Real Estate Net |  | 107,286,330 |  |  |
Encumbrances |  | $ 0 |  |  |
Park Aire [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Wellington, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 268 |  |  |
Initial Cost to Company, Land |  | $ 8,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,908,756 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 30,706 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 40,939,462 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 48,939,462 |  |  |
Accumulated Depreciation |  | (3,974,911) |  |  |
Investment in Real Estate Net |  | 44,964,551 |  |  |
Encumbrances |  | $ 0 |  |  |
Park at Turtle Run The [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coral Springs, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 257 |  |  |
Initial Cost to Company, Land |  | $ 15,420,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 36,064,629 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,581,233 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 15,420,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,645,862 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 53,065,862 |  |  |
Accumulated Depreciation |  | (15,394,768) |  |  |
Investment in Real Estate Net |  | 37,671,094 |  |  |
Encumbrances |  | $ 0 |  |  |
Parkfield [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 476 |  |  |
Initial Cost to Company, Land |  | $ 8,330,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 28,667,618 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,516,386 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,330,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 32,184,004 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 40,514,004 |  |  |
Accumulated Depreciation |  | (17,050,355) |  |  |
Investment in Real Estate Net |  | 23,463,649 |  |  |
Encumbrances |  | $ 0 |  |  |
Preserve at Deer Creek [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Deerfield Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 540 |  |  |
Initial Cost to Company, Land |  | $ 13,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 60,011,208 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 11,825,179 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 71,836,387 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 85,336,387 |  |  |
Accumulated Depreciation |  | (30,159,581) |  |  |
Investment in Real Estate Net |  | 55,176,806 |  |  |
Encumbrances |  | $ 0 |  |  |
Promenade at Aventura [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Aventura, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 296 |  |  |
Initial Cost to Company, Land |  | $ 13,320,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 30,353,748 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,204,516 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 13,320,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 37,558,264 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 50,878,264 |  |  |
Accumulated Depreciation |  | (19,909,831) |  |  |
Investment in Real Estate Net |  | 30,968,433 |  |  |
Encumbrances |  | $ 0 |  |  |
Promenade at Wyndham Lakes [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coral Springs, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 332 |  |  |
Initial Cost to Company, Land |  | $ 6,640,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 26,743,760 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,473,840 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,640,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 32,217,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 38,857,600 |  |  |
Accumulated Depreciation |  | (17,398,951) |  |  |
Investment in Real Estate Net |  | 21,458,649 |  |  |
Encumbrances |  | $ 0 |  |  |
Red Road Commons [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Miami, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 404 |  |  |
Initial Cost to Company, Land |  | $ 27,383,547 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 99,656,440 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,428,548 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 27,383,547 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 102,084,988 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 129,468,535 |  |  |
Accumulated Depreciation |  | (21,124,597) |  |  |
Investment in Real Estate Net |  | 108,343,938 |  |  |
Encumbrances |  | $ 0 |  |  |
Reserve at Ashley Lake [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Boynton Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 440 |  |  |
Initial Cost to Company, Land |  | $ 3,520,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,332,494 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,187,407 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,520,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,519,901 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 34,040,301 |  |  |
Accumulated Depreciation |  | (19,863,102) |  |  |
Investment in Real Estate Net |  | 14,177,199 |  |  |
Encumbrances |  | $ 0 |  |  |
Residences at Bayview [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pompano Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 225 |  |  |
Initial Cost to Company, Land |  | $ 5,783,545 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 39,334,455 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,505,813 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,783,545 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 41,840,268 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 47,623,813 |  |  |
Accumulated Depreciation |  | (10,722,402) |  |  |
Investment in Real Estate Net |  | 36,901,411 |  |  |
Encumbrances |  | $ 0 |  |  |
Reunion at Redmond Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 321 |  |  |
Initial Cost to Company, Land |  | $ 6,975,705 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 46,175,001 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 433,219 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,975,705 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 46,608,220 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 53,583,925 |  |  |
Accumulated Depreciation |  | (12,707,487) |  |  |
Investment in Real Estate Net |  | 40,876,438 |  |  |
Encumbrances |  | $ 0 |  |  |
Sabal Pointe [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coral Springs, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 276 |  |  |
Initial Cost to Company, Land |  | $ 1,951,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 17,570,508 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 7,530,196 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,951,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,100,704 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 27,052,304 |  |  |
Accumulated Depreciation |  | (16,637,960) |  |  |
Investment in Real Estate Net |  | 10,414,344 |  |  |
Encumbrances |  | $ 0 |  |  |
Sage [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Everett, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 123 |  |  |
Initial Cost to Company, Land |  | $ 2,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 12,021,256 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 765,735 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 2,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 12,786,991 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 15,286,991 |  |  |
Accumulated Depreciation |  | (5,027,121) |  |  |
Investment in Real Estate Net |  | 10,259,870 |  |  |
Encumbrances |  | $ 0 |  |  |
Savoy at Dayton Station Combined [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Aurora, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 612 |  |  |
Initial Cost to Company, Land |  | $ 6,109,460 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 60,039,972 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,773,037 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,109,460 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 63,813,009 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 69,922,469 |  |  |
Accumulated Depreciation |  | (22,049,623) |  |  |
Investment in Real Estate Net |  | 47,872,846 |  |  |
Encumbrances |  | $ 0 |  |  |
Scarborough Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Rockville, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 121 |  |  |
Initial Cost to Company, Land |  | $ 1,815,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 7,608,126 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,166,139 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 1,815,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 10,774,265 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 12,589,265 |  |  |
Accumulated Depreciation |  | (6,919,778) |  |  |
Investment in Real Estate Net |  | 5,669,487 |  |  |
Encumbrances |  | $ 0 |  |  |
Sheridan Lake Club [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Dania Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 240 |  |  |
Initial Cost to Company, Land |  | $ 12,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 23,170,580 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,068,143 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 12,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,238,723 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 37,238,723 |  |  |
Accumulated Depreciation |  | (10,173,850) |  |  |
Investment in Real Estate Net |  | 27,064,873 |  |  |
Encumbrances |  | $ 0 |  |  |
Sheridan Ocean Club Combined [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Dania Beach, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 648 |  |  |
Initial Cost to Company, Land |  | $ 18,313,414 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 47,091,594 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 17,913,370 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,313,414 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 65,004,964 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 83,318,378 |  |  |
Accumulated Depreciation |  | (35,303,699) |  |  |
Investment in Real Estate Net |  | 48,014,679 |  |  |
Encumbrances |  | $ 0 |  |  |
St. Andrews at Winston Park [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Coconut Creek, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 284 |  |  |
Initial Cost to Company, Land |  | $ 5,680,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 19,812,090 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,781,847 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,680,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 25,593,937 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 31,273,937 |  |  |
Accumulated Depreciation |  | (12,410,235) |  |  |
Investment in Real Estate Net |  | 18,863,702 |  |  |
Encumbrances |  | $ 0 |  |  |
Stonegate C O [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Broomfield, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 350 |  |  |
Initial Cost to Company, Land |  | $ 8,750,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 32,950,375 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,317,249 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,750,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 36,267,624 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 45,017,624 |  |  |
Accumulated Depreciation |  | (14,957,918) |  |  |
Investment in Real Estate Net |  | 30,059,706 |  |  |
Encumbrances |  | $ 0 |  |  |
Village at Bear Creek [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Lakewood, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 472 |  |  |
Initial Cost to Company, Land |  | $ 4,519,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 40,676,390 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,983,533 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,519,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 46,659,923 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 51,179,623 |  |  |
Accumulated Depreciation |  | (29,814,286) |  |  |
Investment in Real Estate Net |  | 21,365,337 |  |  |
Encumbrances |  | $ 0 |  |  |
Waterford Place C O [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Thornton, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 336 |  |  |
Initial Cost to Company, Land |  | $ 5,040,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 29,946,419 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 2,288,680 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 5,040,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 32,235,099 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 37,275,099 |  |  |
Accumulated Depreciation |  | (14,679,394) |  |  |
Investment in Real Estate Net |  | 22,595,705 |  |  |
Encumbrances |  | $ 0 |  |  |
Welleby Lake Club [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Sunrise, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 304 |  |  |
Initial Cost to Company, Land |  | $ 3,648,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 17,620,879 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,103,581 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 3,648,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 23,724,460 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 27,372,460 |  |  |
Accumulated Depreciation |  | (14,461,774) |  |  |
Investment in Real Estate Net |  | 12,910,686 |  |  |
Encumbrances |  | $ 0 |  |  |
Westchester at Pavilions [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Waldorf, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 491 |  |  |
Initial Cost to Company, Land |  | $ 11,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 89,612,465 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 674,086 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 11,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 90,286,551 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 102,186,551 |  |  |
Accumulated Depreciation |  | (11,937,856) |  |  |
Investment in Real Estate Net |  | 90,248,695 |  |  |
Encumbrances |  | $ 0 |  |  |
Winston F L [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Pembroke Pines, FL |  |  |
Real Estate And Accumulated Depreciation Units |  | 464 |  |  |
Initial Cost to Company, Land |  | $ 18,561,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 49,527,569 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 3,675,757 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 18,561,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 53,203,326 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 71,764,326 |  |  |
Accumulated Depreciation |  | (19,941,539) |  |  |
Investment in Real Estate Net |  | 51,822,787 |  |  |
Encumbrances |  | $ 0 |  |  |
Woodlake WA [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Kirkland, WA |  |  |
Real Estate And Accumulated Depreciation Units |  | 288 |  |  |
Initial Cost to Company, Land |  | $ 6,631,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 16,735,484 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,286,086 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,631,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 23,021,570 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 29,652,970 |  |  |
Accumulated Depreciation |  | (12,784,626) |  |  |
Investment in Real Estate Net |  | 16,868,344 |  |  |
Encumbrances |  | $ 0 |  |  |
Real Estate Held For Sale - Wholly Owned Unencumbered [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 21,494 |  |  |
Initial Cost to Company, Land |  | $ 571,462,444 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 2,250,318,833 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 297,018,230 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 571,462,444 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 2,547,337,063 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 3,118,799,507 |  |  |
Accumulated Depreciation |  | (1,075,431,644) |  |  |
Investment in Real Estate Net |  | 2,043,367,863 |  |  |
Encumbrances |  | $ 0 |  |  |
Marks [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Englewood, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 616 |  |  |
Initial Cost to Company, Land |  | $ 4,928,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 44,622,314 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 11,819,156 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 4,928,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 56,441,470 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 61,369,970 |  |  |
Accumulated Depreciation |  | (36,125,982) |  |  |
Investment in Real Estate Net |  | 25,243,988 |  |  |
Encumbrances |  | $ 19,195,000 |  |  |
Oak Mill Two [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Germantown, MD |  |  |
Real Estate And Accumulated Depreciation Units |  | 192 |  |  |
Initial Cost to Company, Land |  | $ 854,133 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 10,233,947 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,696,831 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 854,133 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 16,930,778 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 17,784,911 |  |  |
Accumulated Depreciation |  | (12,269,574) |  |  |
Investment in Real Estate Net |  | 5,515,337 |  |  |
Encumbrances |  | $ 9,600,000 |  |  |
Stoney Ridge [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Dale City, VA |  |  |
Real Estate And Accumulated Depreciation Units |  | 264 |  |  |
Initial Cost to Company, Land |  | $ 8,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 24,147,091 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 5,964,620 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 8,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 30,111,711 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 38,111,711 |  |  |
Accumulated Depreciation |  | (14,096,604) |  |  |
Investment in Real Estate Net |  | 24,015,107 |  |  |
Encumbrances |  | $ 13,000,000 |  |  |
Uptown Square [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location |  | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units |  | 696 |  |  |
Initial Cost to Company, Land |  | $ 17,492,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 100,696,541 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 6,090,227 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 17,492,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 106,786,768 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 124,278,768 |  |  |
Accumulated Depreciation |  | (41,286,496) |  |  |
Investment in Real Estate Net |  | 82,992,272 |  |  |
Encumbrances |  | $ 99,190,116 |  |  |
Real Estate Held For Sale - Wholly Owned Encumbered [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 1,768 |  |  |
Initial Cost to Company, Land |  | $ 31,274,633 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 179,699,893 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 30,570,834 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 31,274,633 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 210,270,727 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 241,545,360 |  |  |
Accumulated Depreciation |  | (103,778,656) |  |  |
Investment in Real Estate Net |  | 137,766,704 |  |  |
Encumbrances |  | $ 140,985,116 |  |  |
Total Real Estate Held For Sale [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 23,262 |  |  |
Initial Cost to Company, Land |  | $ 602,737,077 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 2,430,018,726 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 327,589,064 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 602,737,077 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 2,757,607,790 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 3,360,344,867 |  |  |
Accumulated Depreciation |  | (1,179,210,300) |  |  |
Investment in Real Estate Net |  | 2,181,134,567 |  |  |
Encumbrances |  | $ 140,985,116 |  |  |
Total Investment in Real Estate and Real Estate Held For Sale [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Real Estate And Accumulated Depreciation Units |  | 103,232 |  |  |
Initial Cost to Company, Land |  | $ 6,871,784,606 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements |  | 20,120,887,256 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures |  | 1,550,024,584 |  |  |
Gross Amount Carried at close of period 12/31/2015, Land |  | 6,871,784,606 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures |  | 21,670,911,840 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures |  | 28,542,696,446 |  |  |
Accumulated Depreciation |  | (6,084,616,312) |  |  |
Investment in Real Estate Net |  | 22,458,080,134 |  |  |
Encumbrances |  | $ 4,704,870,280 |  |  |
Unconsolidated Properties [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Partially Owned Properties |  | 3 |  |  |
Number of Units in Real Estate Property |  | 1,281 |  |  |
Number Of Unconsolidated Projects |  | 2 |  |  |
Depreciable Property [Member] |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |
Furniture, fixtures and equipment |  | $ 1,542,662,923 |  |  |
Building [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 30 |  |  |
Renovations and Improvements Minimum [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 5 |  |  |
Renovations and Improvements Maximum [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 15 |  |  |
Replacements Minimum [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 5 |  |  |
Replacements Maximum [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 10 |  |  |
Management Business Renovations and Improvements Minimum [Member] [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 3 |  |  |
Management Business Renovations and Improvements Maximum [Member] [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Property, Plant and Equipment, Estimated Useful Lives |  | 7 |  |  |
Wholly Owned Encumbered [Member] | Portfolio Entity Encumbrances [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | $ 2,088,177,000 |  |  |
Wholly Owned Encumbered [Member] | Total Consolidated Investment in Real Estate [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | 4,220,456,586 |  |  |
Wholly Owned Encumbered [Member] | Total Investment in Real Estate and Real Estate Held For Sale [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | 4,361,441,702 |  |  |
Partially Owned Encumbered [Member] | Portfolio Entity Encumbrances [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | 24,223,525 |  |  |
Partially Owned Encumbered [Member] | Total Consolidated Investment in Real Estate [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | 343,428,578 |  |  |
Partially Owned Encumbered [Member] | Total Investment in Real Estate and Real Estate Held For Sale [Member] |  |  |  |  |
Real Estates And Accumulated Depreciation Abstract |  |  |  |  |
Encumbrances |  | $ 343,428,578 |  |  |
[1] | (I)through (L) See Encumbrances Reconciliation schedule.

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