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, 2016	Dec. 31, 2015	Dec. 31, 2014
Increase (Decrease) in Operating Capital [Abstract]
Other assets, net	$ (3,551)	$ (1,687)	$ (1,951)
Accounts payable and accrued expenses	(2,309)	(15,478)	19,342
Accrued real estate taxes	5,526	6,386	4,025
Other liabilities	(2,361)	2,245	(1,701)
Other	2,976	2,773	2,583
Change in operating accounts and other	$ 281	$ (5,761)	$ 22,298