Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Revenue derived from related-party transactions	$ 54,322,000	$ 55,740,000	$ 114,833,000	$ 107,328,000
Expedia [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Revenue derived from related-party transactions	54,300,000	55,700,000	114,800,000	107,300,000
Percentage of related-party revenue to total revenue	22.00%	28.30%	24.10%	28.20%
Other related-party operating expenses included within selling and marketing expense	1,400,000	1,800,000	3,200,000	3,500,000
Net related party receivable with Expedia and its subsidiaries	$ 35,200,000		$ 35,200,000		$ 24,000,000
Liberty [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Beneficially ownership of shares of common stock			18,159,752
Percentage taken from outstanding shares of Common Stock			13.90%
Percentage of beneficially ownership of shares of common stock			21.60%
Right to voting			one vote per share
Beneficially ownership of equity securities			56.50%
Liberty [Member] | Class B Common Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Beneficially ownership of shares of Common Stock Class B			12,799,999
Percentage taken from outstanding shares of Class B Common Stock			100.00%
Right to voting			ten votes per share