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Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred Tax Assets, Gross [Abstract] |  |
Warranty, insurance and other accruals | $ 8,218 | $ 8,078
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 4,096 | 3,250
Inventory | 4,441 | 4,720
State taxes | 185 | 160
Net operating loss carryforward | 3,240 | 6,193
Deferred charges | 0 | 506
Total deferred tax assets | 20,180 | 22,907
Deferred Tax Liabilities, Gross [Abstract] |  |
Federal effect of state deferred taxes | 1,079 | 1,777
Depreciation | 4,801 | 2,382
Prepaid expenses | 285 | 310
Deferred Tax Liabilities, Other | 533 | 0
Total deferred tax liabilities | 6,698 | 4,469
Deferred Tax Assets, Net of Valuation Allowance | $ 13,482 | $ 18,438

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