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Accrued Liabilities | 12 Months Ended
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Dec. 31, 2018
Accrued Liabilities |
Accrued Liabilities | 8. ACCRUED LIABILITIES The following table sets forth the components of accrued liabilities, in thousands:
|  | As of
|  | December 31, |  | December 31,
|  | 2018 |  | 2017
Accrued liabilities: |  |  |  |  |  |
Salaries, wages, and commissions |  | $ | 34,085 |  | $ | 25,470
Insurance liabilities |  |  | 25,212 |  |  | 19,770
Deferred revenue |  |  | 19,963 |  |  | 9,275
Interest payable on long-term debt |  |  | 3,951 |  |  | —
Other |  |  | 21,025 |  |  | 20,572
Total accrued liabilities |  | $ | 104,236 |  | $ | 75,087
See Note 1 – Summary of Significant Accounting Policies for discussion of our deferred revenue balances and related revenue recognition policy.

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