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Income Taxes Income Taxes - Valuation Allowance (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
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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

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