Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions (Summary Of Income From Property Held For Sale, Net) (Details)

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Recent Transactions (Summary Of Income From Property Held For Sale, Net) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Less - accumulated depreciation $ (1,131,799) $ (1,332,073)
Rental property held for sale, net 292,243 $ 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 88,012  
Buildings and improvements 482,601  
Less - accumulated depreciation (232,624)  
Less: Unrealized losses on properties held for sale (45,746)  
Rental property held for sale, net $ 292,243