Notes Payable (Details)					1 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) property	May. 01, 2015 USD ($) property item	Apr. 02, 2015 USD ($)	Apr. 02, 2014 USD ($)	Sep. 30, 2015 USD ($) property	Sep. 30, 2015 USD ($) property	Jun. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) property	Sep. 30, 2015 USD ($) property	Sep. 30, 2014 USD ($)	Dec. 31, 2014 property	Mar. 31, 2015 USD ($)
Debt Instrument [Line Items]
Number of unencumbered hotels | property	18				18	18			18	18
Payments of deferred financing costs										$ (4,908,000)	$ (1,332,000)
Loss on extinguishment of debt								$ (531,000)		(2,000)	(531,000)
Senior corporate credit facility
Debt Instrument [Line Items]
Payments of deferred financing costs						$ 800,000
Senior Unsecured Credit Facility
Maximum borrowing capacity of credit facility	$ 400,000,000		$ 400,000,000		$ 400,000,000	400,000,000			$ 400,000,000	400,000,000			$ 150,000,000
Interest rate, description of reference rate	LIBOR		LIBOR
Term of new credit facility			4 years
Extended maturity period			1 year
Maximum borrowing capacity of credit facility with lender approval	$ 800,000,000			$ 800,000,000	800,000,000	800,000,000			800,000,000	800,000,000
Write-off of deferred financing fees							$ 500,000
Outstanding indebtedness under credit facility	0				$ 0	0			0	0
Term loan supplement agreement option period					6 months
Amount available under the term loan supplement agreement	$ 85,000,000				$ 85,000,000	$ 85,000,000			$ 85,000,000	85,000,000
Notes maturing in May 2015
Debt Instrument [Line Items]
Number of hotels provided as collateral | property		4
Repayment of mortgage debt		$ 99,100,000
Number of loans to be repaid | item		4
Embassy Suites La Jolla and JW Marriott New Orleans Amended Mortgages and Senior Corporate Credit Facility
Debt Instrument [Line Items]
Payments of deferred financing costs										$ 4,900,000
Entity that owns the Hilton San Diego Bayfront Mortgage Payable
Debt Instrument [Line Items]
Number of hotels provided as collateral | property	1				1	1			1	1		1
Payments of deferred financing costs								$ 1,300,000			$ 1,300,000
Senior Unsecured Credit Facility
Interest rate, description of reference rate										one-month LIBOR		one-month LIBOR
Interest rate added to base rate (as a percent)										2.25%		2.25%
Minimum | Senior corporate credit facility
Senior Unsecured Credit Facility
Interest rate added to base rate (as a percent)				1.55%					1.55%
Decline in pricing from the old credit facility			(0.30%)
Maximum | Senior corporate credit facility
Senior Unsecured Credit Facility
Interest rate added to base rate (as a percent)				2.30%					2.30%
Decline in pricing from the old credit facility			(0.60%)