Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 3,263	$ 8,205	$ 114,006	$ 114,745
Other Comprehensive Income (Loss)
Change in Fair Value of Derivative Instruments	611	43	(348)	(496)
Less: Reclassification Adjustment for Change in Fair Value of Derivative Instruments Included in Net Income	(144)	110	(424)	428
Total Other Comprehensive Income (Loss)	467	153	(772)	(68)
Comprehensive Income	3,730	8,358	113,234	114,677
Less: Comprehensive Loss (Income) Attributable to Noncontrolling Interests	63	(211)	(5,802)	(4,273)
Less: Preferred Distributions	(6,040)	(4,417)	(18,124)	(12,006)
Less: Extinguishment of Issuance Costs Upon Redemption of Series B Preferred Shares				(4,021)
Comprehensive (Loss) Income Attributable to Common Shareholders	$ (2,247)	$ 3,730	$ 89,308	$ 94,377