Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Assets, Gross [Abstract]
Deferred Tax Assets, Allowance for doubtful accounts	$ 767	$ 1,171
Deferred Tax Assets, Depreciation and amortization	708	2,541
Deferred Tax Assets, Inventory valuation	12,890	11,018
Deferred Tax Assets, Other postretirement/postemployment costs	20,945	20,889
Deferred Tax Assets, Tax loss carryforwards	39,238	58,692
Deferred Tax Assets, Pension	43,998	20,747
Deferred Tax Assets, Accrued compensation	6,885	11,073
Deferred Tax Assets, Goodwill	(31,807)	(28,337)
Deferred Tax Assets, Contingent convertible debt interest	(10,089)	(25,046)
Deferred Tax Assets, Other	9,636	10,459
Deferred Tax Assets	93,171	83,207
Deferred Tax Assets, Valuation allowance	(16,681)	(30,036)
Deferred Tax Assets, Net	76,490	53,171
Deferred Tax Assets, Net, Classification [Abstract]
Deferred Tax Assets, Net, Current	28,829	10,449
Deferred Tax Assets, Net non-current	47,661	42,722
Deferred Tax Assets, Net	76,490	53,171
Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Allowance for doubtful accounts	71	70
Deferred Tax Liabilities, Depreciation and amortization	12,359	12,060
Deferred Tax Liabilities, Inventory valuation	1,109	992
Deferred Tax Liabilities, Other postretirement/postemployment costs	(354)	(321)
Deferred Tax Liabilities, Tax loss carryforwards	0	(1,349)
Deferred Tax Liabilities, Pension	23	125
Deferred Tax Liabilities, Goodwill	633	635
Deferred Tax Liabilities, Swedish tax incentive	3,922	4,169
Deferred Tax Liabilities, Unrealized foreign currency (loss) gain	2,463	2,652
Deferred Tax Liabilities, Other	1,867	3,664
Deferred Tax Liabilities	22,093	22,697
Deferred Tax Liabilities, Classification [Abstract]
Deferred Tax Liabilities, Current	1,431	1,667
Deferred Tax Liabilities, Non-current	20,662	21,030
Deferred Tax Liabilities	22,093	22,697
Decrease in valuation allowance	$ 13,355