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Net Change in Operating Accounts (Effect Of Changes In The Operating Accounts On Cash Flows From Operating Activities) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Increase (Decrease) in Operating Capital [Abstract]    
Other assets, net $ 2,200 $ 6,073
Accounts payable and accrued expenses (7,786) 1,768
Accrued real estate taxes (24,359) (19,722)
Other liabilities (2,211) (5,779)
Other 743 740
Change in operating accounts and other $ (31,413) $ (16,920)