Commitments and Contingencies - Additional Information (Detail)	Sep. 30, 2015 USD ($) Hotel	Dec. 31, 2014 USD ($) Hotel
Variable Interest Entity [Line Items]
Total number of hotels in which company has variable interest entity | Hotel	21	21
Loans to owners	$ 33,000,000
Unfunded loan commitments expected to be funded in total	73,000,000
Unfunded loan commitments to be funded in next twelve months	38,000,000
Equity and other potential contributions associated with managed, franchised or joint venture properties	206,000,000
Equity and other potential contributions associated with managed, franchised or joint venture properties expected to be funded within one year	73,000,000
Surety bonds issued	20,000,000
Reserve for claims	6,000,000
Range of possible loss, minimum	0
Range of possible loss, maximum	22,000,000
Performance guarantee [Member]
Variable Interest Entity [Line Items]
Reserve for claims	11,000,000
VIEs 21 [Member]
Variable Interest Entity [Line Items]
Investment associated with VIEs	100,000,000	$ 106,000,000
Loan balance with VIEs	$ 2,000,000	$ 2,000,000