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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, 2020
Dec. 31, 2019
Dec. 31, 2018
Increase (Decrease) in Operating Capital [Abstract]      
Other assets, net $ (5,235) $ (6,976) $ 10,364
Accounts payable and accrued expenses (62) 19,713 (4,133)
Accrued real estate taxes 11,745 (1,014) 1,910
Other liabilities 997 23,119 (1,486)
Other 2,060 3,252 2,898
Net change in operating accounts and other $ 9,505 $ 38,094 $ 9,553