Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net loss	$ (588,181)	$ (742,745)	$ (687,550)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	231,025	177,542	127,303
Depreciation and amortization expense	62,343	63,257	48,365
Deferred income taxes	3,283	281	(285,053)
Impairment of property and equipment	2,516	1,689	7,594
Excess tax benefit from share-based payment arrangements	0	(2,160)	1,252
Intangible asset impairment charges	0	0	663,500
Deconsolidation of variable interest entity	0	0	55,110
Write-downs of inventories to net realizable value	0	0	10,358
Other non-cash based compensation expense	0	0	5,860
Other non-cash items, net	9,532	0	6,742
Changes in operating assets and liabilities, excluding the effects of the acquisition and deconsolidation of variable interest entities:
Accounts receivable, net	(104,847)	7,428	53,363
Inventories	(23,146)	(16,469)	7,142
Prepaid expenses and other assets	(9,260)	(15,771)	(12,061)
Accounts payable	(1,709)	25,048	(49,234)
Accrued expenses and other liabilities	102,746	(63,183)	34,629
Accrued restructuring expense	(30,492)	17,502	5,025
Deferred revenues	(19,242)	(25,531)	(53,011)
Net cash used in operating activities	(365,432)	(573,112)	(60,666)
Cash flows from investing activities:
Maturities of marketable securities	1,067,443	1,557,938	2,348,295
Purchases of marketable securities	(633,041)	(1,424,172)	(2,412,418)
Payment for acquisition of variable interest entity	(80,000)	(10,000)	0
Expenditures for property and equipment	(45,302)	(51,201)	(51,393)
Investment in note receivable	(30,000)	0	0
(Increase) decrease in restricted cash and cash equivalents	(21,981)	0	31,804
Decrease in restricted cash and cash equivalents (VIE)	11,685	1,638	27,884
Decrease (increase) in other assets	52	(244)	1,698
Payments returned related to construction financing lease obligation	0	8,050	0
Payments on construction costs	0	0	(58,431)
Net cash provided by (used in) investing activities	268,856	82,009	(112,561)
Cash flows from financing activities:
Issuances of common stock under benefit plans	185,592	274,615	265,878
Payments on construction financing lease obligation	(381)	(336)	0
Proceeds from lease financing	23,662	0	0
Payments on capital lease financing	(19,954)	(21,443)	(16,057)
Proceeds from senior secured term loan	0	294,243	0
Excess tax benefit from share-based payment arrangements	0	2,160	(1,252)
Payments to redeem secured notes	0	0	(158)
Net cash provided by financing activities	188,919	549,239	248,411
Effect of changes in exchange rates on cash	(2,834)	(2,176)	4,708
Net increase in cash and cash equivalents	89,509	55,960	79,892
Cash and cash equivalents—beginning of period	625,259	569,299	489,407
Cash and cash equivalents—end of period	714,768	625,259	569,299
Supplemental disclosure of cash flow information:
Cash paid for interest	85,613	68,963	13,458
Cash paid for income taxes	1,806	1,210	2,840
Conversion of convertible senior subordinated notes (due 2015) for common stock	0	0	399,842
Unamortized deferred debt issuance costs exchanged	0	0	4,230
Capitalization of costs related to construction financing lease obligation	0	25,564	215,013
Assets acquired under capital lease obligations	0	9,188	50,972
Issuances of common stock exercises from employee benefit plans receivable	$ 361	$ 637	$ 0