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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
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Increase (Decrease) in Operating Capital [Abstract]    
Other assets, net $ (10,013) $ (9,826)
Accounts payable and accrued expenses (10,718) 18,009
Accrued real estate taxes 18,516 18,886
Other liabilities 2,068 (4,273)
Other 828 650
Change in operating accounts and other $ 681 $ 23,446