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Schedule III (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | $ 1,627,848 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 1,250,141 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 2,496,974 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 2,028,404 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 1,240,455 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 4,535,064 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 5,775,519 | $ 5,895,953 | $ 6,025,797 | $ 4,155,391
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 1,119,571 | 1,086,844 | 1,011,330 | $ 930,769
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Acquisition |  | 164,320 | 38,369 | 0 |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Addition |  | 469,450 | 358,976 | 1,926,404 |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount |  | 585,753 | 527,189 | 55,998 |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Depreciation Expense |  | 161,937 | 151,346 | 136,559 |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Investment in Real Estate Sold |  | 129,169 | 75,832 | $ 55,998 |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Federal Income Tax Basis Difference |  | 55,900 |  |  |
Gross proceeds from sale of real estate |  |  | $ 427,400 |  |
RTC - West Land [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 1,398 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 29,956 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 3,798 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 29,956 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 3,798 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 33,754 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Potomac Land Bay H [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 38,369 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 29 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 38,390 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 8 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 38,398 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
West Half [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 45,668 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 17,902 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 156,076 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 47,342 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 172,304 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 219,646 |  |  |
965 Florida Avenue [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 14,306 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 120,570 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 134,876 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 134,876 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Atlantic Plumbing C [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 47,678 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 13,952 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 94,669 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 156,299 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 156,299 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
1900 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 16,811 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 53,187 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (14,948) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 55,050 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 55,050 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 281 |  |  |
Capitol Point - North [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 32,730 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 18,587 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 50,829 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 488 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 51,317 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Potomac Yard Land Bay G [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 20,318 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 8,815 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 26,804 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 2,329 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 29,133 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Square 649 [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 15,550 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 6,451 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (1,657) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 12,672 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 7,672 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 20,344 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 487 |  |  |
Other Future Development Assets [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 76,771 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 15,286 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 30,549 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 77,185 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 45,421 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 122,606 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 444 |  |  |
Corporation [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 500,000 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 11,925 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 11,925 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 11,925 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 3,788 |  |  |
Metropolitan Park [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 65,259 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 1,326 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 27,963 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 82,898 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 11,650 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 94,548 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 32 |  |  |
Pen Place - Land Parcel [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 104,473 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 55 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (30,625) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 61,970 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 11,933 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 73,903 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 9 |  |  |
Metropolitan Park and Pen Place [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 169,732 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 1,381 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (2,662) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 144,868 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 23,583 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 168,451 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 41 |  |  |
Universal Buildings, Washington DC [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 69,393 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 143,320 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 26,516 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 68,612 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 170,617 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 239,229 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 59,237 |  |  |
2101 L Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 134,290 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 32,815 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 51,642 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 94,247 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 39,768 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 138,936 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 178,704 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 43,962 |  |  |
1730 M Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 47,500 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 10,095 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 17,541 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 17,207 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 10,687 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 34,156 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 44,843 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 14,154 |  |  |
1700 M Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 34,178 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 46,938 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (26,130) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 54,986 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 54,986 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Courthouse Plaza 1 and 2 [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 2,200 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 105,475 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 55,168 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 160,643 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 160,643 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 66,985 |  |  |
2121 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 133,960 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 21,503 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 87,329 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 31,234 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 22,361 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 117,705 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 140,066 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 51,920 |  |  |
2345 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 23,126 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 93,918 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 47,870 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 23,882 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 141,032 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 164,914 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 59,290 |  |  |
2231 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 20,611 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 83,705 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 22,116 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 21,311 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 105,121 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 126,432 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 46,350 |  |  |
1550 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 17,988 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 70,525 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 27,967 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 18,175 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 98,305 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 116,480 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 42,082 |  |  |
RTC - West [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 92,846 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 30,326 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 134,108 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 11,160 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 30,425 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 145,169 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 175,594 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 16,791 |  |  |
RTC - West Retail [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 2,897 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 2,894 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 8,480 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 2,894 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 8,480 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 11,374 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 709 |  |  |
2011 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 18,940 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 76,921 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 42,909 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 19,257 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 119,513 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 138,770 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 53,009 |  |  |
2451 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 16,755 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 68,047 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 27,955 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 12,271 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 100,486 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 112,757 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 42,294 |  |  |
1235 S. Clark Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 78,000 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 15,826 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 56,090 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 31,131 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 16,444 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 86,603 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 103,047 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 36,804 |  |  |
241 18th Street S. [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 13,867 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 54,169 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 40,229 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 17,018 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 91,247 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 108,265 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 36,854 |  |  |
251 18th Street S. [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 34,152 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 12,305 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 49,360 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 57,055 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 15,859 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 102,861 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 118,720 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 44,679 |  |  |
1215 S. Clark Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 13,636 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 48,380 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 54,977 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 14,149 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 102,844 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 116,993 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 36,644 |  |  |
201 12th Street S. [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 32,728 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 14,766 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 52,750 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 24,350 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 15,257 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 76,609 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 91,866 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 33,639 |  |  |
800 North Glebe Road [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 107,500 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 28,168 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 140,983 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 2,290 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 28,168 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 143,273 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 171,441 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 14,785 |  |  |
2200 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 13,104 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 30,050 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 34,931 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 13,565 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 64,520 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 78,085 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 21,773 |  |  |
1225 S. Clark Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 11,176 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 43,495 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 24,169 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 11,601 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 67,239 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 78,840 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 28,228 |  |  |
1901 South Bell Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 11,669 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 36,918 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 21,205 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 12,117 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 57,675 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 69,792 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 26,461 |  |  |
Crystal City Marriott [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 8,000 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 47,191 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 22,029 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 8,045 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 69,175 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 77,220 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 24,859 |  |  |
2100 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 10,287 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 23,590 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 31,845 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 10,686 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 55,036 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 65,722 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 25,709 |  |  |
1800 South Bell Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 28,702 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 8,370 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 213 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 36,859 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 37,072 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 3,807 |  |  |
200 12th Street S. [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 16,439 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 8,016 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 30,552 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 19,867 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 8,320 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 50,115 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 58,435 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 22,991 |  |  |
2001 Richmond Highway [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 7,300 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 16,746 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 11,722 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 7,520 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 28,248 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 35,768 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 12,628 |  |  |
Crystal City Shops at 2100 [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 4,059 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 9,309 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 3,664 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 4,049 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 12,983 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 17,032 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 5,712 |  |  |
Crystal Drive Retail [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 20,465 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 3,194 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 55 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 23,604 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 23,659 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 11,315 |  |  |
7200 Wisconsin Avenue [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 34,683 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 92,059 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 10,430 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 34,683 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 102,489 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 137,172 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 9,361 |  |  |
One Democracy Plaza [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 33,628 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 8,494 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 42,122 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 42,122 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 25,817 |  |  |
4749 Bethesda Avenue [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 2,480 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 11,830 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 53 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 2,872 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 11,491 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 14,363 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 599 |  |  |
4747 Bethesda Avenue [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 29,030 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 10,040 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 126,535 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 29,492 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 136,113 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 165,605 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 837 |  |  |
1770 Crystal Drive [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 10,771 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 44,276 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 30,727 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 85,774 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 85,774 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Central District Retail [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 4,194 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 48,807 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 53,001 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 53,001 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 0 |  |  |
Fort Totten Square [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 24,390 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 90,404 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 995 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 24,395 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 91,394 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 115,789 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 9,227 |  |  |
WestEnd25 [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 96,227 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 67,049 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 5,039 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 111,284 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 68,213 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 115,159 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 183,372 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 30,478 |  |  |
F1RST Residences [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 31,064 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 133,256 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 10 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 31,064 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 133,266 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 164,330 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 421 |  |  |
1221 Van Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 27,386 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 63,775 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 27,162 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 28,198 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 90,125 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 118,323 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 7,905 |  |  |
North End Retail [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 5,847 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 9,333 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (301) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 5,871 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 9,008 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 14,879 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 723 |  |  |
RiverHouse Apartments [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 307,710 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 118,421 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 125,078 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 90,748 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 138,946 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 195,301 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 334,247 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 70,549 |  |  |
The Bartlett [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 41,687 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 225,461 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 41,868 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 225,280 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 267,148 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 21,948 |  |  |
220 20th Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 8,434 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 19,340 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 101,416 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 8,761 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 120,429 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 129,190 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 34,674 |  |  |
2221 South Clark Street [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 7,405 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 16,981 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 41,453 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 7,583 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 58,256 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 65,839 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 8,936 |  |  |
Falkland Chase - South & West [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 40,001 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 18,530 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 44,232 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 1,062 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 18,642 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 45,182 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 63,824 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 5,017 |  |  |
Falkland Chase-North [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 0 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 9,810 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 22,706 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | (2,072) |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 8,994 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 21,450 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 30,444 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | 2,422 |  |  |
Operating and Held for Sale [Member] |  |  |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Amount of Encumbrances |  | 1,627,848 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Land |  | 1,419,873 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Initial Cost of Building and Improvements |  | 2,498,355 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost |  | 2,025,742 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Land, Amount |  | 1,385,323 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Building and Improvements, Amount |  | 4,558,647 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Gross |  | 5,943,970 |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation |  | $ 1,119,612 |  |  |
Metropolitan Park [Member] | Subsequent Event [Member] |  |  |  |  |
Gross proceeds from sale of real estate | $ 155,000 |  |  |  |

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