Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Gross [Abstract]
Deferred Tax Assets, Allowance for doubtful accounts	$ 946	$ 767
Deferred Tax Assets, Depreciation and amortization	(13,881)	708
Deferred Tax Assets, Inventory valuation	15,486	12,890
Deferred Tax Assets, Other postretirement/postemployment costs	20,841	20,945
Deferred Tax Assets, Tax loss carryforwards	48,402	39,238
Deferred Tax Assets, Pension	41,854	43,998
Deferred Tax Assets, Accrued compensation	12,611	6,885
Deferred Tax Assets, Goodwill	(35,236)	(31,807)
Deferred Tax Assets, Contingent convertible debt interest	(10,846)	(10,089)
Deferred Tax Assets, Other	8,626	9,636
Deferred Tax Assets	88,803	93,171
Deferred Tax Assets, Valuation allowance	(24,936)	(16,681)
Deferred Tax Assets, Net	63,867	76,490
Deferred Tax Assets, Net, Classification [Abstract]
Deferred Tax Assets, Net, Current	33,906	28,829
Deferred Tax Assets, Net non-current	29,961	47,661
Deferred Tax Assets, Net	63,867	76,490
Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Allowance for doubtful accounts	78	71
Deferred Tax Liabilities, Depreciation and amortization	35,245	12,359
Deferred Tax Liabilities, Inventory valuation	1,288	1,109
Deferred Tax Liabilities, Other postretirement/postemployment costs	(350)	(354)
Deferred Tax Liabilities, Tax loss carryforwards	0	0
Deferred Tax Liabilities, Pension	(262)	23
Deferred Tax Liabilities, Goodwill	53	633
Deferred Tax Liabilities, Swedish tax incentive	3,898	3,922
Deferred Tax Liabilities, Unrealized foreign currency (loss) gain	2,613	2,463
Deferred Tax Liabilities, Other	7,921	1,867
Deferred Tax Liabilities	50,484	22,093
Deferred Tax Liabilities, Classification [Abstract]
Deferred Tax Liabilities, Current	1,777	1,431
Deferred Tax Liabilities, Non-current	48,707	20,662
Deferred Tax Liabilities	50,484	22,093
Decrease in valuation allowance	$ (8,255)