CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net profit (loss)	$ 49,132	$ 46,267
Adjustments to reconcile net profit to net cash provided by operating activities:
Deferred taxes	13,165	13,506
Depreciation and amortization	9,214	9,099
Amortization of Intangibles	3,330	4,008
Stock-based compensation	15,504	14,206
Excess tax benefit from share-based payment arrangements	(18,140)	(5,988)
Impairment of goodwill	24,665	0
Other Noncash Income (Expense)	848	(156)
Changes in assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(15,460)	(16,086)
Inventories	(5,735)	(2,975)
Prepaid expenses and other assets	(1,620)	522
Accounts payable	(3,888)	3,748
Accrued and other long-term liabilities	(669)	5,504
Deferred revenues	12,674	10,836
Net cash provided by operating activities	83,020	82,491
CASH FLOWS FROM INVESTING ACTIVITIES:
Restricted cash	2,462	0
Purchase of property, plant and equipment	(31,485)	(21,029)
Acquisition, net of cash acquired	0	(186,920)
Purchase of marketable securities	(53,862)	0
Maturities of marketable securities	17,363	8,842
Other assets	(126)	(190)
Net cash used in investing activities	(65,648)	(199,297)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	40,194	19,882
Common stock repurchase	(9,796)	0
Excess tax benefit from share-based payment arrangements	18,140	5,988
Employees' taxes paid upon the vesting of restricted stock units	(1,719)	(1,481)
Net cash provided by financing activities	46,819	24,389
Effect of foreign exchange rate changes on cash and cash equivalents	41	(18)
Net increase (decrease) in cash and cash equivalents	64,232	(92,435)
Cash and cash equivalents, beginning of the period	240,675	294,664
Cash and cash equivalents, end of the period	$ 304,907	$ 202,229