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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Payables and Accruals [Abstract] |
Accrued Liabilities | At December 31, accrued liabilities were comprised of the following:
| December 31,
| 2017 |  | 2016
| (in thousands)
Warranty | $ | 10,483 |  |  | $ | 7,936 |
Due to representatives | 13,086 |  |  | 9,907 |
Payroll | 4,456 |  |  | 4,129 |
Profit sharing | 2,034 |  |  | 1,967 |
Workers' compensation | 593 |  |  | 580 |
Medical self-insurance | 725 |  |  | 872 |
Customer prepayments | 2,838 |  |  | 2,256 |
Donations | 588 |  |  | 600 |
Employee vacation time | 2,688 |  |  | 2,367 |
Other | 1,607 |  |  | 1,326 |
Total | $ | 39,098 |  |  | $ | 31,940 |

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