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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, 2019
Mar. 31, 2018
Increase (Decrease) in Operating Capital [Abstract]    
Other assets, net $ (2,280) $ 2,236
Accounts payable and accrued expenses (6,730) (9,836)
Accrued real estate taxes (23,528) (22,464)
Other liabilities 343 1,600
Other 819 700
Change in operating accounts and other $ (31,376) $ (27,764)