Income Taxes Income Taxes - Valuation Allowance (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Warranty, insurance and other accruals	$ 11,487	$ 11,378
Inventory	17,417	22,612
State taxes	71	(64)
Net operating loss carryforward	98,007	102,475
Deferred charges	613	336
Total deferred tax assets	127,595	136,737
Deferred Tax Assets, Net of Valuation Allowance, Current	(14,913)	(135,749)
Total deferred tax assets, net of valuation allowance	111,646	0
Depreciation	397	804
Prepaid expenses	639	184
Total deferred tax liabilities	1,036	988
Net deferred tax assets	$ 126,559	$ 135,749