Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Expenses and Other Current Liabilities [Line Items]
Accrued content, connection, traffic acquisition, and other costs	$ 119,431	$ 116,951
Deferred income taxes	(10)	200
Accrued compensation and related expenses	343,392	337,727
Accrued taxes payable	107,033	10,619
Accrued professional service expenses	69,869	67,736
Accrued sales and marketing related expenses	17,744	11,988
Accrued restructuring costs	21,764	58,718
Current liability for uncertain tax contingencies		30,484
Other	228,559	174,052
Total accrued expenses and other current liabilities	$ 907,782	$ 808,475