Stockholders' Equity (Details) (USD $)	12 Months Ended						3 Months Ended	1 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended				1 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Entity that owns Hilton San Diego Bayfront	Apr. 30, 2011 Entity that owns Hilton San Diego Bayfront	Dec. 31, 2011 Doubletree Guest Suites Times Square	Jan. 31, 2011 Doubletree Guest Suites Times Square	Jan. 31, 2011 BuyEfficient, LLC	Mar. 31, 2005 Series A and B Cumulative Redeemable Preferred Stock	Apr. 30, 2006 Series A Cumulative Redeemable Preferred Stock	Dec. 31, 2011 Series A Cumulative Redeemable Preferred Stock person	Dec. 31, 2010 Series A Cumulative Redeemable Preferred Stock	Mar. 17, 2010 Series A Cumulative Redeemable Preferred Stock	Dec. 31, 2011 Series A Cumulative Redeemable Preferred Stock Minimum quarter	Apr. 30, 2011 Series D Cumulative Redeemable Preferred Stock	Dec. 31, 2011 Series D Cumulative Redeemable Preferred Stock person	Jun. 14, 2016 Series D Cumulative Redeemable Preferred Stock	Dec. 31, 2011 Series D Cumulative Redeemable Preferred Stock Maximum D	Dec. 31, 2011 Series D Cumulative Redeemable Preferred Stock Minimum quarter	Nov. 30, 2010 Common Stock	Oct. 31, 2009 Common Stock	May 31, 2009 Common Stock
Stockholders' equity
Number of shares of stock issued (in shares)							4,850,000	2,200,000					4,600,000					19,500,000	23,000,000	20,700,000
Dividend rate (as a percent)							8.00%		8.00%	8.00%			8.00%	8.00%
Liquidation preference (in dollars per share)							$ 25.00	$ 25.00	$ 25.00	$ 25.00			$ 25.00	$ 25.00
Gross proceeds from sale of preferred stock							$ 121,300,000	$ 55,000,000					$ 115,000,000
Underwriting and other costs of the offering	4,052,000						3,800,000						4,100,000
Net proceeds from issuance of preferred stock							117,500,000	54,200,000					110,900,000
Redemption price (in dollars per share)											$ 25.00				$ 25.00
Ownership interest acquired (as a percent)		75.00%	75.00%	62.00%	62.00%	50.00%
Number of days after first date of change of control within which the entity may redeem the preferred stock																120
Number of quarters preferred stock dividends must be in arrears before preferred stockholders have certain voting rights												6					6
Number of additional directors preferred stockholders will be entitled to vote for if dividends are in arrears for six or more quarterly periods (in number of persons)									2					2
Number of common shares which preferred stockholders may convert their shares into upon a change of control (in shares)																22,571,280
Number of shares of the underwriters' over-allotment issued (in shares)																			3,000,000	2,700,000
Repayment of outstanding credit facility																				60,000,000
Net proceeds from issuance of common stock																		$ 190,600,000	$ 158,400,000	$ 98,700,000