CONSOLIDATED FINANCIAL STATEMENT DETAILS (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Other Current Assets

	December 31,
	2018		2017
	(In thousands)
Other current assets:
Capitalized costs to obtain a contract with a customer	$	69,817	$	—
Prepaid expenses	55,586		49,350
Capitalized downloadable search toolbar costs, net	33,365		31,588
Income taxes receivable	10,132		33,239
Production costs	2,260		18,570
Other	57,093		52,627
Other current assets	$	228,253	$	185,374

Schedule of Property and Equipment, Net

Asset Category	Estimated Useful Lives
Buildings and leasehold improvements	3 to 39 Years
Computer equipment and capitalized software	2 to 3 Years
Furniture and other equipment	3 to 12 Years

	December 31,
	2018			2017
	(In thousands)
Property and equipment, net of accumulated depreciation and amortization:
Buildings and leasehold improvements	$	249,026		$	246,038
Computer equipment and capitalized software	229,083			218,529
Furniture and other equipment	86,694			88,930
Projects in progress	29,204			19,094
Land	11,591			14,390
Property and equipment	605,598			586,981
Accumulated depreciation and amortization	(286,798		)	(271,811		)
Property and equipment, net of accumulated depreciation and amortization	$	318,800		$	315,170

Schedule of Accrued Expenses and Other Current Liabilities

	December 31,
	2018		2017
	(In thousands)
Accrued expenses and other current liabilities:
Accrued employee compensation and benefits	$	137,583	$	108,431
Accrued advertising expense	105,520		96,445
Other	191,783		162,048
Accrued expenses and other current liabilities	$	434,886	$	366,924

Schedule of Revenue

	Years Ended December 31,
	2018		2017		2016
	(In thousands)
Revenue:
Service revenue	$	4,249,227	$	3,302,937	$	2,967,474
Product revenue	13,665		4,302		172,408
Revenue	$	4,262,892	$	3,307,239	$	3,139,882

Schedule of Cost of Revenue

	Years Ended December 31,
	2018		2017		2016
	(In thousands)
Cost of revenue:
Cost of service revenue	$	898,736	$	647,226	$	617,058
Cost of product revenue	12,410		3,782		138,672
Cost of revenue	$	911,146	$	651,008	$	755,730

Schedule of Other (Expense) Income, Net

	Years Ended December 31,
	2018		2017			2016
	(In thousands)
Other income (expense), net	$	305,746	$	(16,213	)	$	60,650