Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES:
Net loss	$ (164,056)	$ (109,939)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	281,686	172,976
Provision for doubtful accounts and sales returns	11,354	5,075
Amortization of investment premiums, net	7,807	10,515
Amortization of debt discount and issuance costs	22,451	22,511
Stock-based compensation	291,047	248,600
Excess income tax benefit from stock-based compensation	(80)	0
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	32,253	7,602
Deferred commissions	11,771	8,602
Prepaid expenses and other assets	(31,608)	(36,586)
Accounts payable and other liabilities	(11,487)	15,234
Income taxes, net	60,079	(17,247)
Deferred revenue	73,393	63,431
Net cash provided by operating activities	584,610	390,774
INVESTING ACTIVITIES:
Purchases of property and equipment	(385,959)	(162,583)
Purchases of investments	(1,417,159)	(1,087,055)
Sales of investments	394,960	579,861
Maturities of investments	1,003,069	899,955
Payments for intangible assets and acquisitions, net of cash acquired	(47,084)	(654,842)
Changes in deposits and restricted cash	2,574	(3,259)
Net cash used in investing activities	(449,599)	(427,923)
FINANCING ACTIVITIES:
Proceeds from issuance of preferred shares in joint venture	0	20,000
Proceeds from issuance of common stock from employee stock options	4,792	11,921
Proceeds from issuance of common stock from employee stock purchase plan	35,979	20,799
Excess income tax benefit from stock-based compensation	80	0
Repurchases of equity awards	(3,251)	(22,450)
Other financing activities	0	(167)
Net cash provided by financing activities	37,600	30,103
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	959	(2,850)
CHANGE IN CASH AND CASH EQUIVALENTS	173,570	(9,896)
CASH AND CASH EQUIVALENTS—Beginning of period	546,237	460,887
CASH AND CASH EQUIVALENTS—End of period	719,807	450,991
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment recorded in accounts payable and accrued liabilities	50,489	36,002
Issuance of Class A common stock and equity awards for business combinations	$ 56,517	$ 694,209