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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Revenue Recognition, New Accounting Pronouncement, Material Effect, Description | 21.9 |  |  |
Amortization of Below Market Lease |  |  | $ 100 |
Average amortization period for below market leases and in-place leases | 6 months |  | 8 months |
Capitalized interest | $ 15,200 | $ 18,200 | $ 19,300 |
Capitalized real estate taxes | 2,400 | 4,500 | 3,600 |
Outstanding notes receivable | $ 18,790 | $ 17,224 | $ 13,161 | $ 3,395
Weighted average interest rate on outstanding notes receivable | 4.00% | 4.00% |  |
Percentage Of Rental Revenue And Other Income From Leasing Of Apartment Homes | 99.00% | 99.00% | 99.00% |
Amortization of in-place leases | $ 1,300 |  | $ 500 |

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- Definition Percentage of our total property revenues and total non-property income from leasing of apartment homes, excluding income on deferred compensation plans. + References No definition available. + Details
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