CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ 71,090	$ (12,565)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Loss on extinguishment of convertible debt, including write-off of debt issuance costs	0	12,592
Depreciation and amortization	74,831	25,866
Amortization and accretion of investments	5,281	8,680
Amortization of debt discount and debt issuance costs, excluding write-off of debt issuance costs	29,411	13,382
Deferred income taxes	12,289	(23,068)
Stock-based compensation	28,372	24,104
Contingent consideration	(55,868)	7,280
Payment of contingent consideration	0	(24,254)
Provision for inventory reserves	14,014	4,679
Other non-cash	(4,033)	(11,877)
Changes in assets and liabilities:
Accounts receivable	8,028	(12,984)
Inventory	(17,344)	(13,370)
Prepaid expenses and other assets	5,992	1,652
Accounts payable and accrued liabilities	(64,927)	(29,669)
Deferred revenue and other liabilities	(1,346)	1,171
Net cash provided by (used in) operating activities	105,790	(28,381)
Cash flows from investing activities:
Acquisition of business, net of acquired cash	0	(671,729)
Acquisition of intangible assets	(4,000)	0
Purchase of non-voting preferred stock	0	(25,000)
Purchases of property and equipment	(21,070)	(11,691)
Purchases of investments	(403,277)	(736,469)
Proceeds from maturities of investments	431,895	1,183,443
Payment for purchase option	0	(20,000)
Increase in restricted cash	(2,153)	0
Net cash provided by (used in) investing activities	1,395	(281,446)
Cash flows from financing activities:
Payment of contingent consideration	0	(15,746)
Issuance of common stock, net	33,057	29,621
Excess tax benefit on stock-based awards	8,705	12,861
Proceeds from issuance of convertible debt	0	800,000
Payment of debt issuance costs	0	(24,731)
Proceeds from issuance of warrants	0	121,675
Purchase of convertible bond hedge	0	(179,390)
Other	(4,625)	0
Net cash provided by financing activities	37,137	744,290
Net increase in cash and cash equivalents	144,322	434,463
Effect of changes in foreign exchange rates on cash balances	(1,689)	0
Cash and cash equivalents at beginning of period	91,058	104,041
Cash and cash equivalents at end of period	$ 233,691	$ 538,504