Investment in Hotel Properties (Details 2) (USD $)	3 Months Ended		6 Months Ended			1 Months Ended	3 Months Ended	6 Months Ended			1 Months Ended	6 Months Ended	12 Months Ended		3 Months Ended	6 Months Ended			6 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Apr. 30, 2010	Jan. 31, 2011 Doubletree Guest Suites Times Square	Jun. 30, 2011 Doubletree Guest Suites Times Square	Jun. 30, 2011 Doubletree Guest Suites Times Square	Mar. 31, 2011 Doubletree Guest Suites Times Square	Dec. 31, 2006 Doubletree Guest Suites Times Square	Jan. 31, 2011 Doubletree Guest Suites Times Square 8.5 % Hotel Mezzanine loan receivable	Jun. 30, 2011 Doubletree Guest Suites Times Square 8.5 % Hotel Mezzanine loan receivable	Dec. 31, 2010 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	Jun. 30, 2011 JW Marriott New Orleans	Jun. 30, 2011 JW Marriott New Orleans	Feb. 28, 2011 JW Marriott New Orleans	Apr. 30, 2011 Hilton San Diego Bayfront hotel	Jun. 30, 2011 Doubletree Guest Suites Times Square, JW Marriott New Orleans and Entity that owns Hilton San Diego Bayfront	Apr. 30, 2011 Entity that owns Hilton San Diego Bayfront	Jun. 30, 2011 Entity that owns Hilton San Diego Bayfront	Jun. 30, 2011 Entity that owns Hilton San Diego Bayfront	Apr. 30, 2010 Twelve Atlantic Station Subordinate Note Receivable
Investment in hotel properties
Ownership interest acquired (as a percent)						62.00%	62.00%	62.00%	62.00%											75.00%	75.00%	75.00%
Purchase price of acquired entity						$ 37,500,000											$ 93,800,000			$ 475,000,000
Number of rooms in acquired hotels						460				460							494	1,190
Unrestricted cash held						13,000,000														3,700,000
Debt assumed at acquisition						270,000,000	270,000,000	270,000,000							42,200,000	42,200,000	42,200,000		545,952,000
Interest rate, description of reference rate						LIBOR		LIBOR								LIBOR				LIBOR		LIBOR
Interest rate added to base rate (as a percent)						1.15%	1.15%	1.15%												3.25%	3.25%	3.25%
Fixed interest rate (as a percent)															5.45%	5.45%
Amortization period of mortgage loans (in years)															25	25					30	30
Minority interest of Hilton Worldwide																				25.00%
Cash paid, excluding working capital adjustments, to acquire entity																	51,600,000		271,894,000	182,800,000
Debt replaced																				233,800,000		233,800,000
New mortgage loan																				240,000,000	240,000,000	240,000,000
Principal amount of purchased debt					32,500,000						30,000,000	30,000,000		30,000,000									5,000,000
Interest rate on loans receivable (as a percent)											8.50%	8.50%		8.50%									8.075%
Acquisition-related costs							200,000	2,500,000							12,000	400,000					500,000	500,000
Preferred dividends	7,000		14,000				7,000	14,000
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	270,000,000	270,000,000							42,200,000	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	0		69,230,000									0	0						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					30,400,000
Unaudited pro forma results of operations
Revenues	222,318,000	203,844,000	416,089,000	383,378,000
Income available (loss attributable) to common stockholders from continuing operations	8,163,000	(401,000)	61,252,000	(17,268,000)
Income (loss) per diluted share available (attributable) to common stockholders from continuing operations (in dollars per share)		$ (0.06)	$ 0.41	$ (0.28)
Revenues included in the company's consolidated statements of operations related to the company's 2011 acquisitions	68,000,000		89,500,000
Net income included in the company's consolidated statements of operations related to the company's 2011 acquisitions	$ 21,700,000		$ 24,100,000