Recent Transactions (Summary Of Income From Property Held For Sale, Net) (Details) - USD ($) $ in Thousands |
Mar. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Less - accumulated depreciation | $ (1,327,967) | $ (1,332,073) |
| Rental property held for sale, net | 2,131 | $ 39,743 |
| Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Land | 648 | |
| Buildings and improvements | 2,919 | |
| Less - accumulated depreciation | (1,436) | |
| Rental property held for sale, net | $ 2,131 |