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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
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Increase (Decrease) in Operating Capital [Abstract]      
Other assets, net $ (6,724) $ (3,551) $ (1,687)
Accounts payable and accrued expenses (2,300) (2,309) (15,478)
Accrued real estate taxes 2,342 5,526 6,386
Other liabilities (995) (2,361) 2,245
Other 2,831 2,976 2,773
Change in operating accounts and other $ (4,846) $ 281 $ (5,761)