Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 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	$ 56,167,000	$ 56,875,000	$ 171,000,000	$ 164,203,000
Class B Common Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Right to voting			10 votes per share
Vote per common stock share	10		10
Common Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Right to voting			one vote per share
Vote per common stock share	1		1
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			14.00%
Percentage of beneficially ownership of shares of common stock			21.80%
Beneficially ownership of equity securities			56.80%
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			10 votes per share
Vote per common stock share	10		10
Liberty [Member] | Common Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Right to voting			one vote per share
Vote per common stock share	1		1
Expedia [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Revenue derived from related-party transactions	56,200,000	56,900,000	171,000,000	164,200,000
Percentage of related-party revenue to total revenue	22.00%	26.70%	23.40%	27.70%
Other related-party operating expenses included within selling and marketing expense	1,800,000	1,700,000	4,900,000	5,200,000
Net related party receivable with Expedia and its subsidiaries	$ 33,900,000		$ 33,900,000		$ 24,000,000