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, 2018	Dec. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Operating Capital [Abstract]
Other assets, net	$ 10,364	$ (6,724)	$ (3,551)
Accounts payable and accrued expenses	(4,133)	(2,300)	(2,309)
Accrued real estate taxes	1,910	2,342	5,526
Other liabilities	(1,486)	(995)	(2,361)
Other	2,898	2,831	2,976
Change in operating accounts and other	$ 9,553	$ (4,846)	$ 281