Investments in Unconsolidated Joint Ventures (Details) (USD $)	1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended			12 Months Ended
	Apr. 30, 2010	Dec. 31, 2010	Dec. 31, 2009	Jan. 31, 2011 Doubletree Guest Suites Times Square	Dec. 31, 2009 Doubletree Guest Suites Times Square	Dec. 31, 2006 Doubletree Guest Suites Times Square Room	Jan. 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	Jan. 31, 2011 BuyEfficient, LLC	Dec. 31, 2011 BuyEfficient, LLC Strategic Hotels and Resorts, Inc. ("Strategic")	Dec. 31, 2010 BuyEfficient, LLC Strategic Hotels and Resorts, Inc. ("Strategic")	Dec. 31, 2009 BuyEfficient, LLC Strategic Hotels and Resorts, Inc. ("Strategic")	Dec. 31, 2007 BuyEfficient, LLC Strategic Hotels and Resorts, Inc. ("Strategic")
Investments in unconsolidated joint ventures
Ownership interest acquired (as a percent)				62.00%		38.00%			50.00%
Number of rooms in acquired hotels						460
Impairment loss					$ 26,000,000
Purchase price of acquired entity				37,500,000					9,000,000
Gain on remeasurement of equity interest				30,100,000					8,700,000
Gain on remeasurement of investment							30,400,000
Principal amount of purchased debt	32,500,000							30,000,000
Interest rate on loans receivable (as a percent)								8.50%
Purchase price of debt	3,700,000	3,950,000						3,450,000
Ownership interest sold to Strategic (as a percent)													50.00%
Distributions received		900,000	500,000								900,000	500,000
Stock-based compensation expense										$ 4,000	$ 49,000	$ 74,000