Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES:
Net income (loss)	$ (164,761)	$ (15,320)	$ 26,769
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	420,472	236,946	134,516
Provision for doubtful accounts and sales returns	12,717	11,346	4,775
Amortization of investment premiums, net	20,334	13,613	8,268
Amortization of debt discount and transaction costs	45,559	5,916	0
Stock-based compensation	510,274	319,133	193,915
Excess income tax benefit from stock-based compensation	(12,239)	(99,247)	(43,755)
Changes in operating assets and liabilities:
Accounts receivable	(149,461)	(137,571)	(102,618)
Deferred commissions	(26,508)	(22,409)	(18,249)
Prepaid expenses and other assets	(58,019)	(42,032)	(19,481)
Accounts payable and other liabilities	100,926	149,971	114,713
Income taxes, net	(36,279)	19,280	3,120
Deferred revenue	143,960	129,325	134,500
Net cash provided by operating activities	806,975	568,951	436,473
INVESTING ACTIVITIES:
Purchases of property and equipment	(507,246)	(547,633)	(278,019)
Purchases of investments	(2,812,480)	(3,431,566)	(1,493,754)
Sales of investments	1,240,502	294,033	179,904
Maturities of investments	1,958,394	1,665,199	258,425
Payments for intangible assets and acquisitions, net of cash acquired	(677,847)	(253,538)	(19,197)
Changes in deposits	6,600	(19,766)	(4,904)
Net cash used in investing activities	(792,077)	(2,293,271)	(1,357,545)
FINANCING ACTIVITIES:
Proceeds from issuance of convertible senior notes, net	0	1,305,414	0
Payments for convertible note hedges	0	(247,969)	0
Proceeds from issuance of warrants	0	167,296	0
Proceeds from follow-on offering, net of offering costs	0	0	1,348,059
Proceeds from issuance of preferred shares in joint venture	20,000	400	4,600
Proceeds from issuance of common stock from employee stock options	21,686	33,577	32,824
Proceeds from issuance of common stock from employee stock purchase plan	49,296	32,816	24,589
Excess income tax benefit from stock-based compensation	12,239	99,247	43,755
Repurchases of equity awards	25,240	0	0
Other financing activities	(167)	(2,296)	392
Net cash provided by financing activities	77,814	1,388,485	1,454,219
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(7,362)	(6,367)	(466)
CHANGE IN CASH AND CASH EQUIVALENTS	85,350	(342,202)	532,681
CASH AND CASH EQUIVALENTS - Beginning of period	460,887	803,089	270,408
CASH AND CASH EQUIVALENTS - End of period	546,237	460,887	803,089
SUPPLEMENTAL DISCLOSURES OF OTHER CASH FLOW INFORMATION:
Cash paid for income taxes	13,750	10,291	6,049
Cash paid for interest	6,410	0	0
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment recorded in accounts payable and accrued liabilities	82,990	43,472	25,724
Issuance of Class A common stock and stock options for business combinations	$ 695,028	$ 64,207	$ 40,927