Investments In Unconsolidated Joint Ventures (Summary Of Results Of Operations Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments In Unconsolidated Joint Ventures [Abstract]
Total revenues	$ 310,919	$ 358,751	$ 377,711
Operating and other expenses	(230,863)	(297,492)	(262,703)
Depreciation and amortization	(40,193)	(31,020)	(75,512)
Interest expense	(34,874)	(25,822)	(58,390)
Net income (loss)	$ 4,989	$ 4,417	$ (18,894)