Restructuring and Related Reorganization Charges - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and related reorganization charges	[1]	$ 6,638	$ 71,679	$ 46,274	$ 82,001
Minimum
Restructuring Cost and Reserve [Line Items]
Total expected restructuring charges in current year		50,000		50,000
Maximum
Restructuring Cost and Reserve [Line Items]
Total expected restructuring charges in current year		$ 55,000		$ 55,000

[1] Includes stock-based compensation as follows: Cost of revenue $3,476 thousand, $1,112 thousand, $8,768 thousand, and $3,586 thousand; Selling and marketing $4,876 thousand, $10,558 thousand, $37,372 thousand, and $23,890 thousand; Technology and content $11,556 thousand, $7,062 thousand, $50,997 thousand, and $19,405 thousand; General and administrative $27,308 thousand, $15,694 thousand, $87,775 thousand, and $57,925 thousand; Restructuring and related reorganization charges $1,047 thousand, $29,230 thousand, $12,690 thousand, and