Income Taxes Income Taxes - Valuation Allowance (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Warranty, insurance and other accruals	$ 11,373	$ 12,003
Inventory	14,892	16,657
State taxes	109	106
Net operating loss carryforward	88,699	91,659
Deferred charges	944	897
Total deferred tax assets	116,017	121,322
Deferred Tax Assets, Net of Valuation Allowance, Current	(3,964)	(9,291)
Total deferred tax assets, net of valuation allowance	111,214	110,911
Depreciation	(497)	774
Prepaid expenses	(342)	346
Total deferred tax liabilities	(839)	1,120
Net deferred tax assets	$ 112,053	$ 112,031