Consolidated Statements Of Equity - USD ($) $ in Thousands	Common Shares [Member] Class A Common Shares [Member]	Common Shares [Member]	Preferred Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Distributions in Excess of Net Earnings [Member]	Total Shareholders' Equity [Member]	Noncontrolling Interests Common Units And LTIP Units [Member]	Noncontrolling Interests Shares [Member]	Noncontrolling Interests Common Units [Member]	Noncontrolling Interests Consolidated Variable Interest Entity [Member]	Total Noncontrolling Interests [Member]	Redeemable Noncontrolling Interests Shares [Member]	Redeemable Noncontrolling Interests Common Units [Member]	Total
Balance at Dec. 31, 2012	$ 497		$ 70	$ 1,179,780	$ (1,786)	$ (348,734)	$ 829,827			$ 15,484	$ 476	$ 15,960			$ 845,787
Balance, redeemable noncontrolling interests at Dec. 31, 2012														$ 15,321
Balance (in shares) at Dec. 31, 2012		49,668,102	7,000,000						1,012,064
Balance, redeemable noncontrolling interests (in shares) at Dec. 31, 2012													3,064,252
Unit Conversion				(234)			(234)			(766)		(766)			$ (1,000)
Unit Conversion (in shares)		6,948							(49,448)						6,948
Reallocation of Noncontrolling Interest										15,365		15,365		(15,365)	$ 15,365
Reallocation of Noncontrolling Interest (in shares)									766,063				(3,064,252)
Preferred Stock Issuance
Preferred Stock Offering, net of costs			$ 30	72,340			72,370								72,370
Preferred Stock Offering, net of costs (in shares)			3,000,000
Preferred Stock Redemption			$ (24)	(59,976)			(60,000)								(60,000)
Preferred Stock Redemption (in shares)			(2,400,000)
Dividends and Distributions declared:
Common Shares						(50,836)	(50,836)								(50,836)
Preferred Shares						(14,611)	(14,611)								(14,611)
Common Units										(1,669)		(1,669)			(1,669)
Dividend Reinvestment Plan				38			38								38
Dividend Reinvestment Plan (in shares)		1,802
Stock Based Compensation
Grants	10			497			507								507
Grants (in shares)		1,013,017
Amortization				9,871			9,871								9,871
Change in Fair Value of Derivative Instruments					1,410		1,410								1,410
Net Income (Loss)						49,613	49,613			1,109	(818)	291		$ 44	49,904
Balance at Dec. 31, 2013	507		$ 76	1,202,316	(376)	(364,568)	837,955	$ 29,523		$ 29,523	(342)	29,181			867,136
Balance (in shares) at Dec. 31, 2013		50,689,868	7,600,000					1,728,679	1,728,679
Unit Conversion				(77)			(77)	$ (261)				(261)			$ (338)
Unit Conversion (in shares)		4,725						(16,326)							4,725
Restricted Shares Forfeiture/LTIP Unit Issuance	(5)			5			0								$ 0
Restricted Shares Forfeiture (in shares)		(487,081)													1,948,324
LTIP Unit Issuance (in shares)								487,081
Repurchase of Common Shares	(7)			(13,791)		(1,621)	(15,419)								$ (15,419)
Dividends and Distributions declared:
Common Shares						(52,091)	(52,091)								(52,091)
Preferred Shares						(14,356)	(14,356)								(14,356)
Common Units								$ (1,793)				$ (1,793)			$ (1,793)
LTIP Units								(136,000)				(136,000)			(136,000)
Dividend Reinvestment Plan				50			50								$ 50
Dividend Reinvestment Plan (in shares)		2,162
Stock Based Compensation
Grants	2			647			649								649
Grants (in shares)		155,811
Amortization				5,397			5,397								5,397
Change in Fair Value of Derivative Instruments					18		18								18
Net Income (Loss)						67,255	67,255	$ 1,749			(733)	$ 1,016			68,271
Balance at Dec. 31, 2014	497		$ 76	1,194,547	(358)	(365,381)	829,381	$ 29,082			(1,075)	28,007			$ 857,388
Balance (in shares) at Dec. 31, 2014		49,708,771	7,600,000					2,199,434
Repurchase of Common Shares (in shares)		(656,714)
Unit Conversion				132			132	$ (132)				(132)
Unit Conversion (in shares)		8,965						(8,965)							8,965
LTIP Unit Issuance (in shares)															128,832
Repurchase of Common Shares	(53)			(110,517)		(17,669)	(128,239)								$ (128,239)
Dividends and Distributions declared:
Common Shares						(52,664)	(52,664)								(52,664)
Preferred Shares						(14,356)	(14,356)								(14,356)
Common Units								$ (1,913)				$ (1,913)			$ (1,913)
LTIP Units								(694,000)				(694,000)			(694,000)
Dividend Reinvestment Plan				50			50								$ 50
Dividend Reinvestment Plan (in shares)		2,018
Stock Based Compensation
Grants				620			620								620
Grants (in shares)		47,985						128,832
Amortization				1,427			1,427	$ 4,437				$ 4,437			5,864
Change in Fair Value of Derivative Instruments					(108)		(108)								(108)
Net Income (Loss)						41,796	41,796	1,096			(685)	411			42,207
Balance at Dec. 31, 2015	$ 444		$ 76	$ 1,086,259	$ (466)	$ (408,274)	$ 678,039	$ 31,876			$ (1,760)	$ 30,116			$ 708,155
Balance (in shares) at Dec. 31, 2015		44,457,368	7,600,000					2,319,301
Repurchase of Common Shares (in shares)		(5,310,371)													(5,310,371)