Debt (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Nov. 20, 2012	Aug. 27, 2013
Debt
Interest expense	$ 29,560,000		$ 15,574,000		$ 3,524,000
Outstanding borrowings on the Revolver	1,025,000,000
Mortgage loans	532,747,000		559,665,000
2014	165,747,000
2015	224,000,000
2016	143,000,000
2017	400,000,000
2018	625,000,000
Thereafter	0
Outstanding borrowings	1,557,747,000
Revolver
Debt
Maximum borrowings						300,000,000.0
Interest expense	1,177,000		1,222,000		158,000
Outstanding borrowings on the Revolver	0
Revolver | Minimum
Debt
Spread over variable interest rate basis (as a percent)	1.65%
Revolver | Maximum
Debt
Spread over variable interest rate basis (as a percent)	3.00%
Standby letters of credit
Debt
Maximum borrowings	30,000,000.0
Fee on debt (as a percent)	0.125%
Standby letters of credit | Minimum
Debt
Number of standby letters of credit that may be issued	1
Swingline loans
Debt
Maximum borrowings	40,000,000.0
Revolving Credit Facility and Term Loans
Debt
Fees incurred	2,900,000		3,000,000		5,200,000
Interest expense	0		0		2,345,000
Outstanding borrowings on the Revolver	0
Revolving Credit Facility and Term Loans | Minimum
Debt
Number of hotel properties required to remain unencumbered by outstanding indebtedness	20
Five-Year Term Loan
Debt
Debt Instrument, Face Amount						400,000,000.0
Debt period			5 years
Interest expense	6,902,000		5,453,000		662,000
Outstanding borrowings on the Revolver	400,000,000
Interest rate (as a percent)	2.37%
Seven-Year Term Loan
Debt
Debt Instrument, Face Amount						225,000,000.0
Mortgage Loans
Debt
Number of assets encumbered	33
Mortgage loans	532,747,000		559,665,000
Mortgage Loans | Capmark Financial Group, lender 2
Debt
Number of assets encumbered	1
Interest rate (as a percent)	5.55%	[1]
Mortgage loans	10,513,000		10,916,000
Mortgage Loans | Capmark Financial Group, lender 3
Debt
Number of assets encumbered	1
Interest rate (as a percent)	5.55%	[1]
Mortgage loans	4,561,000		4,736,000
Mortgage Loans | Barclay's Bank, lender 1
Debt
Number of assets encumbered	12
Interest rate (as a percent)	5.55%	[1]
Mortgage loans	107,544,000		111,632,000
Mortgage Loans | Barclay's Bank, lender 2
Debt
Number of assets encumbered	4
Interest rate (as a percent)	5.60%	[1]
Mortgage loans	26,775,000		27,804,000
Mortgage Loans | Capmark Financial Group, lender 4
Debt
Number of assets encumbered	1
Interest rate (as a percent)	5.50%	[1]
Mortgage loans	6,214,000		6,450,000
Mortgage Loans | Barclay's Bank, lender 19
Debt
Number of assets encumbered	1
Interest rate (as a percent)	5.44%	[1]
Mortgage loans	10,140,000		10,521,000
Mortgage Loans | PNC Bank
Debt
Number of additional maturity terms	1
Number of assets encumbered	5	[2]
Interest rate (as a percent)	2.51%	[1],[2]
Mortgage loans	74,000,000	[2]	85,000,000	[2]
Number of hotels encumbered by loans that are cross-collateralized	5
Mortgage Loans | Wells Fargo lender 6
Debt
Number of assets encumbered	4	[3]
Interest rate (as a percent)	4.18755%	[1],[3]
Mortgage loans	150,000,000	[3]	150,000,000	[3]
Number of hotels encumbered by loans that are cross-collateralized	2
Mortgage Loans | Wells Fargo, lender 7
Debt
Number of assets encumbered	4
Interest rate (as a percent)	4.06%	[1]
Mortgage loans	143,000,000		0
Mortgage Loans | Wells Fargo, lender 8
Debt
Mortgage loans	0		142,000,000
Mortgage Loans | Merrill Lynch, lender 1
Debt
Mortgage loans	0		4,068,000
Mortgage Loans | Merrill Lynch Lender 2 [Member]
Debt
Mortgage loans	0		2,475,000
Mortgage Loans | Merrill Lynch, lender 3
Debt
Mortgage loans	0		4,063,000
Mortgage Loans | Well Fargo Lender
Debt
Number of additional maturity terms	4
Additional maturity term	1 year
Seven Year Term Loan
Debt
Debt period			7 years
Interest expense	9,217,000		5,049,000		359,000
Outstanding borrowings on the Revolver	225,000,000
Interest rate (as a percent)	4.04%
Unsecured Term Loan Due August 27, 2018
Debt
Debt Instrument, Face Amount							400,000,000.0
Interest expense	12,264,000		3,850,000		0
Outstanding borrowings on the Revolver	$ 400,000,000
Interest rate (as a percent)	3.07%

[1] Interest rate at December 31, 2014 gives effect to interest rate hedges and LIBOR floors, as applicable.

[2] (4)Requires payments of interest only until the commencement of the extension period(s).

[3] (6)Two of the four hotels encumbered by the Wells Fargo loans are cross-collateralized.