Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Deferred tax assets
Loss carryforwards(1)	$ 174,360	[1]	$ 164,254
Accrued expenses	40,593		32,998
Depreciation and amortization	16,770		9,632
Warranty reserves	16,704		16,712
Tax credits(2)	16,073	[2]	7,054
Pension plan benefits expense	13,464		14,834
Equity compensation	9,908		10,501
Inventory valuation	2,942		4,557
Other deferred tax assets, net	9,858		5,824
Total deferred tax assets	300,672		266,366
Valuation allowance	(161,026)		(138,910)
Total deferred tax assets, net of valuation allowance	139,646		127,456
Deferred tax liabilities
Depreciation and amortization	50,606		59,210
Tax effect of accumulated translation	(1,551)		(2,012)
Other deferred tax liabilities, net	(2,883)		(4,826)
Total deferred tax liabilities	55,040		66,048
Net deferred tax assets	84,606		61,408
U.S. federal
Deferred tax assets
Loss carryforwards(1)	$ 23,100	[1]

[1] For tax return purposes at December 31, 2013, we had U.S. federal loss carryforwards of $23.1 million that expire during the years 2020 and 2021. At December 31, 2013, we have net operating loss carryforwards in Luxembourg of $408.1 million that can be carried forward indefinitely, offset by a full valuation allowance (see discussion below). 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, 2013, there was a valuation allowance of $161.0 million primarily associated with foreign loss carryforwards.

[2] For tax return purposes at December 31, 2013, we had: (1) U.S. general business credits of $28.0 million, which begin to expire in 2021; (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 $900,000, which begin to expire in 2019.