CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES [Abstract]
Net loss	$ (15,437)	$ (4,217)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities
Depreciation and amortization	10,316	7,162
Amortization of Inventory Step-Up in Fair value	4,589	0
Share-based compensation including acquisition	1,835	2,392
Change in deferred tax assets	1,470	44
Other noncash income (expense)	(490)	(118)
Changes in operating assets and liabilities [Abstract]
Accounts receivable, net	1,164	(769)
Inventories	(3,728)	1,306
Prepaid expenses and other assets	1,027	1,944
Accounts payable and accrued liabilities	908	(9,170)
Deferred revenue	11,035	(449)
Other long-term liabilities	(1,320)	575
Net cash provided by (used in) operating activities	11,369	(1,300)
CASH FLOWS FROM INVESTING ACTIVITIES [Abstract]
Capital expenditures	(1,104)	(1,388)
Purchase of non-marketable investment	(200)	0
Proceeds from sales of available-for-sale securities	9,364	95
Proceeds from maturities of available-for-sale securities	0	388
Purchase of technology rights	(335)	(1,000)
Net cash provided by (used in) investing activities	7,725	(1,905)
CASH FLOWS FROM FINANCING ACTIVITIES [Abstract]
Issuance of common stock, net	52	(154)
Repurchase of convertible notes	(3,855)	(91,614)
Payments of Term Loan	(3,188)	0
Net cash used in financing activities	(6,991)	(91,768)
Effect of exchange rate changes on cash and cash equivalents	(278)	74
Net increase (decrease) in cash and cash equivalents	11,825	(94,899)
Cash and cash equivalents at beginning of year	25,671	201,937
Cash and cash equivalents at end of year	$ 37,496	$ 107,038