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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Accrued Liabilities |
Accrued Liabilities | The following table sets forth the components of accrued liabilities, in thousands:
|  | As of December 31,
|  | 2017 |  | 2016
Accrued liabilities: |  |  |  |  |  |
Salaries, wages, and commissions |  | $ | 25,470 |  | $ | 20,684
Insurance liabilities |  |  | 19,770 |  |  | 20,410
Other |  |  | 29,847 |  |  | 23,305
Total accrued liabilities |  | $ | 75,087 |  | $ | 64,399

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