Restructuring and Related Reorganization Charges - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016		Dec. 31, 2015	[1]	Dec. 31, 2014	[1]
Restructuring Cost and Reserve [Line Items]
Restructuring and related reorganization charges	$ 23,000	$ 26,000	$ 55,907	[1]	$ 104,871		$ 25,630
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges			10,000
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges			$ 15,000

[1] (1) Includes stock-based compensation as follows: Cost of revenue$11,388 $5,307 $3,921Selling and marketing46,654 33,164 18,067Technology and content63,536 26,766 22,100General and administrative108,149 80,082 40,923Restructuring and related reorganization charges12,690 32,749 —