Income Taxes Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Gross [Abstract]
Warranty, insurance and other accruals	$ 11,378	$ 12,418
Inventory	22,612	29,795
State taxes	(64)	73
Net operating loss carryforward	102,475	99,979
Deferred charges	336	389
Total deferred tax assets	136,737	142,654
Deferred Tax Liabilities, Gross [Abstract]
Depreciation	804	1,470
Prepaid expenses	184	359
Total deferred tax liabilities	988	1,829
Less valuation allowance	135,749	140,825
Net deferred tax asset	$ 0	$ 0