Hotel Acquisitions (Details) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	May 31, 2011 Royalton / Morgans [Member] Rooms Hotels		Dec. 31, 2011 Royalton / Morgans [Member]	Dec. 31, 2010 Royalton / Morgans [Member]	Aug. 31, 2010 Fairmont Copley Plaza [Member] Rooms	Dec. 31, 2010 Fairmont Copley Plaza [Member]
Business Acquisition [Line Items]
Number of hotels acquired (in hotels)												2
Number of rooms acquired (in rooms)												282				383
Acquisition costs												$ 1,300,000
Assets
Investment in hotels												136,035,000	[1]
Restricted cash												2,500,000
Accounts receivable												635,000
Other assets												322,000
Total assets acquired												139,492,000
Liabilities
Accrued expenses and other liabilities												1,507,000
Net assets acquired												137,985,000
Investment in Hotels Allocation
Land												48,700,000
Building and improvements												78,300,000
Furniture, fixtures and equipment												9,000,000
Business Acquisition, Pro Forma Information [Abstract]
Total revenues														866,497,000	809,018,000		799,987,000
Net loss														(132,087,000)	(225,876,000)		(227,360,000)
Earnings per share/unit - basic and diluted (in dollars per share)														$ (1.45)	$ (3.25)		$ (3.27)
Revenue	222,174,000	234,563,000	244,823,000	207,965,000	210,729,000	221,214,000	228,489,000	194,719,000	909,525,000	855,151,000	776,878,000			20,400,000			16,800,000
Net income (loss) attributable to reporting entity	$ (92,388,000)	$ (19,025,000)	$ 11,869,000	$ (28,463,000)	$ (33,093,000)	$ (22,832,000)	$ (42,265,000)	$ (31,664,000)	$ (128,007,000)	$ (129,854,000)	$ (223,041,000)			$ 1,900,000			$ 2,500,000

[1] Investment in hotels was allocated to land ($48.7 million), building and improvements ($78.3 million) and furniture, fixtures and equipment ($9.0 million).