Consolidated Statements Of Equity - USD ($) $ in Thousands	Common Shares [Member] Class A Common Shares [Member]	Common Shares [Member] Class B 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 Consolidated Variable Interest Entity [Member]	Total Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2014	$ 1,989			$ 76	$ 1,193,056	$ (358)	$ (365,381)	$ 829,382	$ 29,082	$ (1,075)	$ 28,007	$ 857,389
Balance (in shares) at Dec. 31, 2014			49,708,771	7,600,000					2,199,434
Unit Conversion/Redemption
Restricted Shares Forfeiture/LTIP Unit Issuance
Repurchase of Common Shares	(20)				(10,267)		(2,340)	(12,627)				(12,627)
Dividends and Distributions declared:
Common Shares							(13,784)	(13,784)				(13,784)
Preferred Shares							(3,589)	(3,589)				(3,589)
Common Units									$ (480)		$ (480)	$ (480)
LTIP Units									(172,000)		(172,000)	(172,000)
Dividend Reinvestment Plan					15			15				$ 15
Dividend Reinvestment Plan (in shares)			593
Stock Based Compensation
Grants
Grants (in shares)			12,031
Amortization					294			294	$ 2,314		$ 2,314	2,608
Change in Fair Value of Derivative Instruments						(556)		(556)				(556)
Net (Loss) Income							(3,946)	(3,946)	(279)	(164)	(443)	(4,389)
Balance at Mar. 31, 2015	1,969			$ 76	1,183,098	(914)	(389,040)	795,189	$ 30,465	(1,239)	29,226	824,415
Balance (in shares) at Mar. 31, 2015			49,226,954	7,600,000					2,199,434
Repurchase of Common Shares (in shares)			(494,441)
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
Unit Conversion/Redemption
Repurchase of Common Shares	(1)				(2,313)			(2,314)				(2,314)
Dividends and Distributions declared:
Common Shares							(12,422)	(12,422)				(12,422)
Preferred Shares							(3,589)	(3,589)				(3,589)
Common Units									$ (477)		$ (477)	$ (477)
LTIP Units									628,000		628,000	628,000
Dividend Reinvestment Plan					15			15				$ 15
Dividend Reinvestment Plan (in shares)			863
Stock Based Compensation
Grants					(1,060)			(1,060)	$ 1,060		$ 1,060
Grants (in shares)			21,550						294,245
Amortization					257			257	$ 3,302		3,302	3,559
Change in Fair Value of Derivative Instruments						(237)		(237)				(237)
Net (Loss) Income							(7,732)	(7,732)	(525)	(162)	(687)	(8,419)
Balance at Mar. 31, 2016	$ 443			$ 76	$ 1,083,158	$ (703)	$ (432,017)	$ 650,957	$ 34,608	$ (1,922)	$ 32,686	$ 683,643
Balance (in shares) at Mar. 31, 2016			44,363,524	7,600,000					2,613,546
Repurchase of Common Shares (in shares)			(116,257)