CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES [Abstract]
Net loss	$ (10,696)	$ (28,161)	$ (10,233)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	36,068	32,309	35,460
Amortization of Inventory Step-Up in Fair value	9,444	0	0
Excess tax benefits for share-based compensation	0	(200)	(416)
Share-based compensation including acquisition	17,207	8,771	9,910
Change in deferred tax assets	(34,003)	415	(73)
Impairment of property and equipment, net-held for sale	3,491	1,710	0
Other noncash income (expense)	1,348	6,702	323
Changes in operating assets and liabilities [Abstract]
Accounts receivable, net	(514)	8,260	12,599
Inventories	12	6,522	5,117
Prepaid expenses and other assets	6,338	3,297	10,802
Accounts payable and accrued liabilities	(21,655)	(448)	(12,801)
Deferred revenue	(2,023)	(1,740)	(2,881)
Other long-term liabilities	(1,286)	1,900	168
Net cash provided by operating activities	3,731	39,337	47,975
CASH FLOWS FROM INVESTING ACTIVITIES [Abstract]
Capital expenditures	(8,166)	(5,779)	(7,726)
Purchases of available-for-sale securities	0	(86,252)	(453,138)
Proceeds from sales of available-for-sale securities	52,063	189,440	417,981
Proceeds from maturities of available-for-sale securities	1,138	32,982	110,477
Acquisition of businesses, net of cash acquired	(307,796)	0	0
Proceeds from sale of property and equipment	5,509	493	0
Capital distribution from non-marketable investments	681	0	0
Purchase of technology rights	(2,362)	(3,250)	(1,383)
Net cash(used in) provided by investing activities	(258,933)	127,634	66,211
CASH FLOWS FROM FINANCING ACTIVITIES [Abstract]
Issuance of common stock, net	276	(683)	(1,182)
Repurchase of convertible notes	(91,614)	(3)	(143,993)
Excess tax benefits for share-based compensation	0	200	416
Net Proceeds From Term Loan	80,500	0	0
Payments of Term Loan	(11,724)	0	0
Net proceeds from 4.00% convertible senior notes	101,062	0	0
Net cash provided by (used in) financing activities	78,500	(486)	(144,759)
Effect of exchange rate changes on cash and cash equivalents	436	(32)	415
Net (decrease) increase in cash and cash equivalents	(176,266)	166,453	(30,158)
Cash and cash equivalents at beginning of year	201,937	35,484	65,642
Cash and cash equivalents at end of year	25,671	201,937	35,484
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION [Abstract]
Cash paid for interest	(6,968)	(3,341)	(9,284)
Cash received (paid) for income taxes, net of refunds	$ 3,905	$ (633)	$ (1,450)