Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 75,400,000
Tax Credit Carryforward, Valuation Allowance	58,500,000
Deferred tax assets
Loss carryforwards(1)	188,607,000	[1]	174,360,000
Tax Credit Carryforward, Amount	81,903,000	[2]	16,073,000
Accrued expenses	54,393,000		40,593,000
Depreciation and amortization	19,111,000		16,770,000
Warranty reserves	19,141,000		16,704,000
Pension plan benefits expense	19,679,000		13,464,000
Equity compensation	10,039,000		9,908,000
Inventory valuation	4,420,000		2,942,000
Other deferred tax assets, net	8,968,000		9,858,000
Total deferred tax assets	406,261,000		300,672,000
Valuation allowance	(256,619,000)		(161,026,000)
Total deferred tax assets, net of valuation allowance	149,642,000		139,646,000
Deferred tax liabilities
Depreciation and amortization	37,061,000		50,606,000
Tax effect of accumulated translation	(568,000)		(1,551,000)
Other deferred tax liabilities, net	(2,299,000)		(2,883,000)
Total deferred tax liabilities	39,928,000		55,040,000
Net deferred tax assets	109,714,000		84,606,000
Deferred Tax Assets, Tax Credit Carryforwards, General Business	18,200,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	2,500,000
U.S. federal
Deferred tax assets
Loss carryforwards(1)	19,800,000	[1]
LUXEMBOURG
Deferred tax assets
Loss carryforwards(1)	$ 441,300,000	[1]

[1] For tax return purposes at December 31, 2014, we had U.S. federal loss carryforwards of $19.8 million that expire during the years 2020 and 2021. At December 31, 2014, we have net operating loss carryforwards in Luxembourg of $441.3 million that can be carried forward indefinitely, offset by a full valuation allowance. The remaining portion of the loss carryforwards are composed primarily of losses in various other foreign jurisdictions. The majority of these losses can be carried forward indefinitely. At December 31, 2014, there was a valuation allowance of $256.6 million primarily associated with foreign loss carryforwards and foreign tax credit carryforwards (discussed below).

[2] For tax return purposes at December 31, 2014, we had: (1) U.S. general business credits of $18.2 million, which begin to expire in 2022; (2) U.S. alternative minimum tax credits of $2.5 million that can be carried forward indefinitely; and (3) U.S. foreign tax credits of $75.4 million, which begin to expire in 2019. At December 31, 2014, there was a valuation allowance of $58.5 million associated with foreign tax credit carryforward.