Income Tax Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of income (loss) before income taxes
United States ("U.S.")	$ (86,085)	$ (84,751)	$ (100,050)
Foreign	89,498	79,438	73,718
Net income (loss) before income tax expense	3,413	(5,313)	(26,332)
Current
U.S. Federal	440	7,565	(16,229)
U.S. State	215	25	426
Foreign	13,504	6,210	1,321
Total	14,159	13,800	(14,482)
Deferred
U.S. Federal	2,000	100,982	26,736
U.S. State	87	16,882	(7,604)
Foreign	(263)	12,224	8,897
Total	1,824	130,088	28,029
Total income tax expense	15,983	143,888	13,547
Reconciliation of the U.S. federal statutory tax rate to the actual tax rate is as follows:
Statutory U.S. federal income tax rate (as a percent)	35.00%	35.00%	35.00%
U.S. state income taxes, net of federal benefit (as a percent)	(132.20%)	141.90%	40.30%
Federal benefit of R&D credits, net (as a percent)	(2.50%)	9.50%	(14.90%)
Foreign earnings at lower rates than U.S. federal rate (as a percent)	(530.20%)	170.90%	56.00%
Federal expense (benefit) of U.S. permanent differences (as a percent)	246.90%	(251.90%)	(2.70%)
Federal valuation allowance adjustments (as a percent)	853.30%	(2816.10%)	(165.80%)
Other (as a percent)	(1.60%)	1.80%	0.70%
Effective tax rates (as a percent)	468.70%	(2708.90%)	(51.40%)
Deferred tax assets:
Inventory valuation	10,294	8,886
Reserves and other accrued expenses	6,865	5,096
Compensation not currently deductible	9,168	6,184
Employee pension benefit included in other comprehensive (loss) income	3,097	1,711
Unrealized losses and income from derivative financial instruments included in other comprehensive (loss) income		758
Share based compensation	26,326	25,085
Net operating loss carry forwards	136,018	125,483
Tax credit carry forwards	41,881	45,790
Differences in financial reporting and tax basis for Property and Equipment	13,148	17,729
Valuation allowance	(236,296)	(234,813)
Realizable deferred tax assets	10,501	1,909
Deferred tax liabilities:
Deferred costs and prepaid expenses	(2,795)	(923)
Unrealized losses and income from derivative financial instruments included in other comprehensive (loss) income	(44)
Differences in financial reporting and tax basis for:
Identifiable intangible assets	(51,628)	(43,837)
Total deferred tax liabilities	(54,467)	(44,760)
Net deferred tax assets on balance sheet	(43,966)	(42,851)
Reported As:
Current deferred tax assets	4,697	2,448
Non-current deferred tax assets	11,217	15,580
Current deferred tax liabilities	(3,616)	(21)
Non-current deferred tax liabilities	(56,264)	(60,858)
Net deferred tax assets on balance sheet	$ (43,966)	$ (42,851)