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 profit (loss)	$ (12,663)	$ 49,476
Adjustments to reconcile net profit to net cash provided by operating activities:
Deferred taxes	6,272	9,228
Depreciation and amortization	7,087	5,905
Amortization of Intangibles	1,702	2,246
Stock-based compensation	13,675	10,142
Excess tax benefit from share-based payment arrangements	(15,331)	(16,745)
Impairment of goodwill	40,693	0
Asset Impairment Charges	26,320	0
Recovery of doubful accounts and returns	(1,081)	310
Other Noncash Income (Expense)	(13)	74
Changes in assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(7,567)	(11,813)
Inventories	(581)	(5,221)
Prepaid expenses and other assets	(234)	(1,970)
Accounts payable	50	(1,954)
Accrued and other long-term liabilities	3,298	(3,927)
Deferred revenues	2,099	7,004
Net cash provided by operating activities	63,726	42,755
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to Acquire Businesses, Net of Cash Acquired	(7,652)	0
Restricted cash	1,053	2,848
Purchase of property, plant and equipment	(9,389)	(25,778)
Purchase of marketable securities	(150,806)	(43,857)
Maturities of marketable securities	18,117	10,002
Proceeds from Sale of Available-for-sale Securities	5,043	0
Other assets	(138)	(125)
Net cash used in investing activities	(143,772)	(56,910)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	21,128	23,689
Common stock repurchase	(95,108)	(2,524)
Excess tax benefit from share-based payment arrangements	15,331	16,745
Employees' taxes paid upon the vesting of restricted stock units	(3,234)	(1,627)
Other payments for financing activities	(13)	0
Net cash provided by financing activities	(61,896)	36,283
Effect of foreign exchange rate changes on cash and cash equivalents	53	(4)
Net increase (decrease) in cash and cash equivalents	(141,889)	22,124
Cash and cash equivalents, beginning of the period	306,386	240,675
Cash and cash equivalents, end of the period	$ 164,497	$ 262,799