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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Payables and Accruals [Abstract] |
Schedule of Accrued Liabilities | Accrued liabilities consist of the following balances:
|  | December 31,
(in thousands) |  | 2017 |  | 2016
Salaries, wages and bonuses |  | $ | 27,073 |  |  | $ | 19,368 |
Warranty |  | 5,335 |  |  | 5,262 |
State taxes |  | 905 |  |  | 2,284 |
Other |  | 7,141 |  |  | 6,244 |
Accrued Liabilities |  | $ | 40,454 |  |  | $ | 33,158 |

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