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, 2019	Dec. 31, 2018	Dec. 31, 2017
Increase (Decrease) in Operating Capital [Abstract]
Other assets, net	$ (6,976)	$ 10,364	$ (6,724)
Accounts payable and accrued expenses	19,713	(4,133)	(2,300)
Accrued real estate taxes	(1,014)	1,910	2,342
Other liabilities	23,119	(1,486)	(995)
Other	3,252	2,898	2,831
Change in operating accounts and other	$ 38,094	$ 9,553	$ (4,846)