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:
Net profit (loss)	$ (41,983)	$ 20,984
Adjustments to reconcile net profit to net cash provided by operating activities:
Deferred taxes	931	4,726
Depreciation and amortization	3,855	2,753
Amortization of Intangibles	1,089	1,146
Stock-based compensation	6,410	4,863
Excess tax benefit from share-based payment arrangements	(7,739)	(8,043)
Impairment of goodwill	40,693	0
Asset Impairment Charges	26,320	0
Recovery of doubful accounts and returns	(1,196)	(119)
Other Noncash Income (Expense)	(10)	52
Changes in assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(9,240)	(2,398)
Inventories	(320)	(4,030)
Prepaid expenses and other assets	(586)	(1,530)
Accounts payable	1,611	(3,641)
Accrued and other long-term liabilities	(7,941)	(9,191)
Deferred revenues	(1,476)	1,809
Net cash provided by operating activities	10,418	7,381
CASH FLOWS FROM INVESTING ACTIVITIES:
Restricted cash	1,053	3
Purchase of property, plant and equipment	(5,608)	(12,559)
Purchase of marketable securities	(3,282)	(28,190)
Maturities of marketable securities	4,366	2,751
Other assets	26	0
Net cash used in investing activities	(3,445)	(37,995)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	13,268	10,180
Common stock repurchase	(2,438)	(2,524)
Excess tax benefit from share-based payment arrangements	7,739	8,043
Employees' taxes paid upon the vesting of restricted stock units	(3,141)	(1,408)
Other	(5)	0
Net cash provided by financing activities	15,423	14,291
Effect of foreign exchange rate changes on cash and cash equivalents	(37)	9
Net increase (decrease) in cash and cash equivalents	22,359	(16,314)
Cash and cash equivalents, beginning of the period	306,386	240,675
Cash and cash equivalents, end of the period	$ 328,745	$ 224,361