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Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred Tax Assets, Gross [Abstract] |  |
Warranty, insurance and other accruals | $ 12,738 | $ 8,987
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 5,482 | 5,473
Inventory | 8,223 | 9,528
State taxes | 219 | 211
Net operating loss carryforward | 8,483 | 42,556
Deferred charges | 1,812 | 649
Total deferred tax assets | 36,957 | 67,404
Deferred Tax Liabilities, Gross [Abstract] |  |
Federal effect of state deferred taxes | 3,879 | 5,519
Depreciation | 1,947 | 0
Prepaid expenses | 256 | 0
Total deferred tax liabilities | 6,082 | 5,519
Deferred Tax Assets, Net of Valuation Allowance | $ 30,875 | $ 61,885

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