Recent Transactions (Summary Of Income From Property Held For Sale, Net) (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Less - Accumulated depreciation | $ (935,339) | $ (1,097,868) |
| Rental property held for sale, net | 33,239 | $ 108,848 |
| Paramus, New Jersey [Member] | 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 | 10,487 | |
| Buildings and improvements | 50,997 | |
| Less - Accumulated depreciation | (24,845) | |
| Less: Cumulative unrealized losses on property held for sale | (3,400) | |
| Rental property held for sale, net | $ 33,239 |