Net Change in Operating Accounts (Effect Of Changes In The Operating Accounts On Cash Flows From Operating Activities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Increase (Decrease) in Operating Capital [Abstract]
Other assets, net	$ (3,938)	$ (9,974)
Accounts payable and accrued expenses	33	(10,400)
Accrued real estate taxes	22,564	18,509
Other liabilities	3,281	2,133
Other	2,226	2,112
Change in operating accounts and other	$ 24,166	$ 2,380