Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net loss	$ (232,457)	$ (312,627)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization expense	15,788	10,691
Stock-based compensation expense	46,580	31,275
Other non-cash based compensation expense	0	2,432
Intangible asset impairment charge	0	412,900
Deferred income taxes	0	(128,703)
Other non-cash items, net	(173)	(975)
Changes in operating assets and liabilities:
Accounts receivable, net	25,237	(48,834)
Inventories	2,488	9,231
Prepaid expenses and other assets	(17,937)	(24,986)
Accounts payable	978	(40,571)
Accrued expenses and other liabilities	(13,536)	23,236
Accrued restructuring expense	(4,486)	(869)
Deferred revenues	1,756	2,022
Net cash provided by (used in) operating activities	(175,762)	(65,778)
Cash flows from investing activities:
Purchases of marketable securities	(380,949)	(458,971)
Sales and maturities of marketable securities	376,544	430,535
Expenditures for property and equipment	(15,526)	(16,607)
Decrease (increase) in restricted cash and cash equivalents (Alios)	0	6,975
Decrease (increase) in deposits	(476)	472
Net cash used in investing activities	(20,407)	(37,596)
Cash flows from financing activities:
Issuances of common stock from employee benefit plans	60,134	21,670
Payments on capital lease obligations	(2,622)	(10,096)
Payments on construction financing lease obligation	(15,146)	(17,709)
Payments of Financing Costs	8,050	0
Net cash provided by (used in) financing activities	50,416	(6,135)
Effect of changes in exchange rates on cash	499	(799)
Net decrease in cash and cash equivalents	(145,254)	(110,308)
Cash and cash equivalents—beginning of period	569,299	489,407
Cash and cash equivalents—end of period	424,045	379,099
Supplemental disclosure of cash flow information:
Cash paid for interest	15,970	243
Cash paid for income taxes	140	1,541
Capitalization of construction in-process related to construction financing lease obligation	25,564	66,052
Assets acquired under capital lease	$ 3,619	$ 0