CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (21,543)	$ 19,432
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Depreciation and amortization	20,427	14,210
Amortization of inventory step-up in fair value	9,084	0
Share-based compensation	3,110	12,598
Deferred tax assets	0	(44,643)
Other non-cash transactions	479	(263)
Changes in operating assets and liabilities:
Accounts receivable, net	6,253	140
Inventories	(1,128)	2,625
Prepaid expenses and other assets	1,704	2,006
Accounts payable and accrued liabilities	(5,796)	(10,585)
Deferred revenue	10,783	553
Other long-term liabilities	(1,661)	393
Net cash provided by (used in) operating activities	21,712	(3,534)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of business, net of cash acquired	0	(308,011)
Proceeds from sales of available-for-sale securities	9,364	52,063
Proceeds from maturities of available-for-sale securities	0	388
Capital distribution from non-marketable investments	0	681
Capital expenditures	(2,271)	(5,174)
Purchase of non-marketable investment	(200)	0
Purchase of technology rights	(440)	(1,950)
Net cash provided by (used in) investing activities	6,453	(262,003)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock, net	521	338
Payments of term loan	(6,376)	0
Net proceeds from term loan	0	80,500
Net proceeds from issuance of 4.00% convertible senior notes	0	101,062
Bond and loan issuance costs	(228)	0
Repurchase of 3.50% senior convertible notes	(3,855)	(91,614)
Net cash (used in) provided by financing activities	(9,938)	90,286
Effect of exchange rate changes on cash and cash equivalents	(224)	46
Net increase (decrease) in cash and cash equivalents	18,003	(175,205)
Cash and cash equivalents at beginning of period	25,671	201,937
Cash and cash equivalents at end of period	$ 43,674	$ 26,732