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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Average amortization period for below market leases and in-place leases |  | 8 months | 7 months |
Capitalized interest | $ 18,200 | $ 19,300 | $ 22,200 |
Capitalized real estate taxes | 4,500 | 3,600 | 4,400 |
Outstanding notes receivable | $ 17,224 | $ 13,161 | $ 3,395 | $ 3,395
Weighted average interest rate on outstanding notes receivable | 4.10% | 4.10% |  |
Remaining Commitment Under Notes Receivable | $ 800 |  |  |
Percentage Of Rental Revenue And Other Income From Leasing Of Apartment Homes | 99.00% | 99.00% | 99.00% |
Adjustment to cash and cash equivalents on the cash flow statement |  | $ 6,000 | $ 5,900 |
Adjustment to change in investing activities on the cash flow statement |  | $ (100) | $ 700 |

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- Definition Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=68064133&loc=d3e61044-112788 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68064133&loc=d3e61082-112788 + Details
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