Schedule III - Real Estate And Accumulated Depreciation (Reconciliation Of Real Estate and Accumulated Depreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Real Estate [Roll Forward]
Balance at beginning of year	$ 1,999,438	$ 1,864,382	$ 1,629,312
Additions during the year	372,011	135,056	333,889
Dispositions / Deconsolidation of consolidated joint venture during the year	(360,828)		(98,819)
Total Real Estate	2,010,621	1,999,438	1,864,382
Reconciliation of Accumulated Depreciation [Roll Forward]
Balance at beginning of year	237,129	189,889	162,189
Depreciation for year	46,078	47,240	43,218
Accumulated depreciation on assets sold	(60,695)		(15,518)
Balance at end of year	$ 222,512	$ 237,129	$ 189,889