Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Cash Flows [Abstract]
Net income (loss)	$ (419,003)	$ 36,131	$ 128,088
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	41,640	28,981	17,945
Stock-based compensation	69,527	80,680	71,399
Excess tax benefit from stock-based compensation	(3,463)	(29,348)	(77,134)
Deferred income taxes	38,568	(11,468)	(16,920)
Non-cash restructuring charges	17,601	0	0
Impairment of intangible assets	7,088	0	0
Other	7,574	5,427	1,865
Changes in operating assets and liabilities:
Accounts receivable, net	(18,816)	38,313	(61,323)
Inventory	21,040	(35,005)	(41,033)
Prepaid expenses and other assets	(14,618)	(23,281)	(30,317)
Accounts payable and other liabilities	142,941	68,461	98,354
Deferred revenue	2,168	(1,280)	5,998
Net cash provided by (used in) operating activities	(107,753)	157,611	96,922
Investing activities:
Purchases of property and equipment, net	(43,627)	(51,245)	(27,210)
Purchases of marketable securities	0	(220,055)	(103,827)
Maturities of marketable securities	119,918	94,680	1,083
Sale of marketable securities	47,348	30,048	0
Acquisitions, net of cash acquired	(104,353)	(65,405)	(3,950)
Net cash provided by (used in) investing activities	19,286	(211,977)	(133,904)
Financing activities:
Proceeds from issuance of common stock, net	2,775	22,833	300,097
Excess tax benefit from stock-based compensation	3,463	29,348	77,134
Payment of deferred acquisition-related consideration	(950)	0	(2,000)
Payment of credit facility issuance costs	(3,333)	0	0
Payment of deferred public offering costs	0	(903)	(5,730)
Repurchases of outstanding common stock	0	(35,613)	0
Repayment of debt	0	0	(114,000)
Net cash provided by financing activities	1,955	15,665	255,501
Effect of exchange rate changes on cash and cash equivalents	(1,046)	(1,556)	0
Net increase (decrease) in cash and cash equivalents	(87,558)	(40,257)	218,519
Cash and cash equivalents at beginning of period	279,672	319,929	101,410
Cash and cash equivalents at end of period	192,114	279,672	319,929
Supplementary cash flow disclosure:
Cash paid for interest	0	0	1,853
Cash paid (refunded) for income taxes, net	9,690	(1,093)	37,283
Non-cash investing and financing activities:
Conversion of preferred stock to common stock, net	0	0	77,198
Purchases of property and equipment included in accounts payable and accrued liabilities	2,258	5,153	2,474
Reclass of deferred public offering costs to additional paid-in capital	$ 0	$ 0	$ 7,722