Investment in Hotel Properties (Details 2) (USD $)	3 Months Ended								12 Months Ended					1 Months Ended	12 Months Ended	1 Months Ended			12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended			12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011 acquisition	Dec. 31, 2010	Dec. 31, 2009	Apr. 30, 2010	Apr. 30, 2010 Twelve Atlantic Station Subordinate Note Receivable	Jan. 31, 2011 Doubletree Guest Suites Times Square Room	Dec. 31, 2011 Doubletree Guest Suites Times Square	Jan. 31, 2011 Doubletree Guest Suites Times Square 8.5% Hotel Mezzanine loan receivable	Dec. 31, 2011 Doubletree Guest Suites Times Square 8.5% Hotel Mezzanine loan receivable	Apr. 30, 2010 Doubletree Guest Suites Times Square 8.5% Hotel Mezzanine loan receivable	Dec. 31, 2011 JW Marriott New Orleans Y	Feb. 28, 2011 JW Marriott New Orleans Room	Apr. 30, 2011 Entity that owns Hilton San Diego Bayfront Y Room	Dec. 31, 2011 Entity that owns Hilton San Diego Bayfront Y	Jun. 30, 2010 Renaissance Westchester	Jun. 14, 2010 Renaissance Westchester	Aug. 31, 2009 Renaissance Westchester Room	Dec. 31, 2011 Acquisitions 2011
Investment in hotel properties
Ownership interest acquired (as a percent)														62.00%	62.00%						75.00%	75.00%
Non-recourse mortgage cancelled											$ 187,500,000												$ 29,200,000
Purchase price of acquired entity														37,500,000						93,800,000				26,000,000
Implicit gross value of acquired entity																					475,000,000
Number of rooms in acquired hotel														460						494	1,190				347
Unrestricted cash held														13,000,000							3,700,000
Debt assumed at acquisition														270,000,000					42,200,000	42,200,000						545,952,000
Fixed interest rate (as a percent)																			5.45%
Amortization period of mortgage loans (in years)																			25		30	30
Minority interest of Hilton Worldwide (as a percent)																					25.00%	25.00%
Cash paid, excluding working capital adjustments, to acquire entity																				51,600,000	182,800,000			24,800,000		271,894,000
Restricted cash held and related costs																								1,200,000
Repayment of mortgage loan											119,800,000										233,800,000	233,800,000
Principal amount of purchased debt												32,500,000	5,000,000			30,000,000		30,000,000
Gain on extinguishment of debt									18,145,000	86,235,000	54,506,000												6,700,000
Interest rate on loans receivable (as a percent)													8.075%				8.50%	8.50%
Acquisition-related costs															2,500,000				400,000			500,000
Preferred dividends									30,000						30,000
Number of acquisitions									3
Assets:
Investment in hotel properties																										907,654,000
Cash																										16,680,000
Restricted cash																										17,105,000
Accounts receivable																										10,060,000
Other assets																										7,473,000
Total assets acquired																										958,972,000
Liabilities:
Notes payable														270,000,000					42,200,000	42,200,000						545,952,000
Accounts payable and other current liabilities																										19,558,000
Total liabilities acquired																										565,510,000
Non-controlling interest																										61,067,000
Gain on remeasurement of equity interest														30,100,000
Gain on remeasurement of equity interests									69,230,000																	60,501,000
Land																										27,400,000
Buildings and improvements																										700,100,000
Furniture, fixtures and equipment																										49,300,000
Intangibles																										130,900,000
Gain on remeasurement of investment																30,400,000
Unaudited pro forma results of operations
Revenues									873,505,000	821,354,000	791,063,000
Total revenues	245,083,000	212,334,000	218,254,000	159,058,000	176,890,000	152,475,000	157,393,000	137,786,000	834,729,000	624,544,000	609,312,000															169,100,000
Income available (loss attributable) to common stockholders from continuing operations									51,210,000	(17,292,000)	(45,138,000)
Net Income (Loss)	$ (7,588,000)	$ 16,553,000	$ (38,929,000)	$ (51,335,000)	$ (35,672,000)	$ (23,653,000)	$ (308,000)	$ 21,091,000	$ (81,299,000)	$ (38,542,000)	$ 269,608,000															$ 500,000
Income (loss) per diluted share available (attributable) to common stockholders from continuing operations (in dollars per share)									$ 0.20	$ (0.38)	$ (0.95)