Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details)

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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Accrued Liabilities    
Salaries, wages, and commissions $ 39,908 $ 32,154
Insurance liabilities 23,440 22,506
Deferred revenue 16,817 16,139
Interest payable on long-term debt 9,563 3,966
Other 27,728 23,653
Total accrued liabilities $ 117,456 $ 98,418