Income Tax Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of income (loss) before income taxes
United States ("U.S.")	$ (98,335)	$ (86,085)	$ (84,751)
Foreign	50,329	89,498	79,438
Net (loss) income before income tax expense	(48,006)	3,413	(5,313)
Current
U.S. Federal	(133)	440	7,565
U.S. State	(90)	215	25
Foreign	9,969	13,504	6,210
Total	9,746	14,159	13,800
Deferred
U.S. Federal	3,154	2,000	100,982
U.S. State	687	87	16,882
Foreign	1,034	(263)	12,224
Total	4,875	1,824	130,088
Total income tax expense	14,621	15,983	143,888
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)	7.00%	(132.20%)	141.90%
Federal benefit of R&D credits, net (as a percent)	4.80%	(2.50%)	9.50%
Foreign earnings at lower rates than U.S. federal rate (as a percent)	13.80%	(530.20%)	170.90%
Federal expense (benefit) of U.S. permanent differences (as a percent)	(56.10%)	246.90%	(251.90%)
Federal valuation allowance adjustments (as a percent)	(35.10%)	853.30%	(2816.10%)
Other (as a percent)	0.10%	(1.60%)	1.80%
Effective tax rates (as a percent)	30.50%	(468.70%)	2708.90%
Deferred tax assets:
Inventory valuation	11,426	9,844
Reserves and other accrued expenses	3,683	6,215
Compensation not currently deductible	7,139	9,168
Employee pension benefit included in other comprehensive (loss) income	5,348	3,097
Unrealized losses and income from derivative financial instruments included in other comprehensive (loss) income	470	0
Share based compensation	10,144	26,326
Net operating loss carry forwards	166,673	136,018
Tax credit carry forwards	32,750	41,881
Differences in financial reporting and tax basis for Property and Equipment	17,115	14,649
Valuation allowance	(241,156)	(236,296)
Realizable deferred tax assets	13,592	10,902
Deferred tax liabilities:
Deferred costs and prepaid expenses	(2,781)	(2,795)
Unrealized losses and income from derivative financial instruments included in other comprehensive (loss) income	0	(44)
Differences in financial reporting and tax basis for:
Identifiable intangible assets	(61,092)	(51,628)
Total deferred tax liabilities	63,873	54,467
Net deferred tax assets on balance sheet	(50,281)	(43,565)
Reported As:
Current deferred tax assets	6,800	3,606
Non-current deferred tax assets	6,281	12,709
Current deferred tax liabilities	(1,097)	(3,616)
Non-current deferred tax liabilities	(62,265)	(56,264)
Net deferred tax assets on balance sheet	(50,281)	(43,565)
Valuation allowance	$ 241,156	$ 236,296