Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets, Gross [Abstract]
Deferred Tax Assets, Allowance for doubtful accounts	$ 520	$ 946
Deferred Tax Assets, Depreciation and amortization	1,886	(13,881)
Deferred Tax Assets, Inventory valuation	17,292	15,486
Deferred Tax Assets, Other postretirement/postemployment costs	3,065	20,841
Deferred Tax Assets, Tax loss carryforwards	15,363	48,402
Deferred Tax Assets, Pension	1,631	41,854
Deferred Tax Assets, Accrued compensation	5,949	12,611
Deferred Tax Assets, Goodwill	0	(35,236)
Deferred Tax Assets, Contingent convertible debt interest	(12,848)	(10,846)
Deferred Tax Assets, Other	6,555	8,626
Deferred Tax Assets	39,413	88,803
Deferred Tax Assets, Valuation allowance	(18,873)	(24,936)
Deferred Tax Assets, Net	20,540	63,867
Deferred Tax Assets, Net, Classification [Abstract]
Deferred Tax Assets, Net, Current	18,226	33,906
Deferred Tax Assets, Net non-current	2,314	29,961
Deferred Tax Assets, Net	20,540	63,867
Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Allowance for doubtful accounts	88	78
Deferred Tax Liabilities, Depreciation and amortization	96,305	35,245
Deferred Tax Liabilities, Inventory valuation	4,241	1,288
Deferred Tax Liabilities, Other postretirement/postemployment costs	(14,536)	(350)
Deferred Tax Liabilities, Tax loss carryforwards	(1,445)	0
Deferred Tax Liabilities, Pension	(1,049)	(262)
Deferred Tax Liabilities, Accrued compensation	(9,381)	0
Deferred Tax Liabilities, Goodwill	12,805	53
Deferred Tax Liabilities, Swedish tax incentive	4,590	3,898
Deferred Tax Liabilities, Unrealized foreign currency (loss) gain	2,948	2,613
Deferred Tax Liabilities, Other	3,735	7,921
Deferred Tax Liabilities	98,301	50,484
Deferred Tax Liabilities, Classification [Abstract]
Deferred Tax Liabilities, Current	3,795	1,777
Deferred Tax Liabilities, Non-current	94,506	48,707
Deferred Tax Liabilities	98,301	50,484
Decrease in valuation allowance	$ 6,063