Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details)

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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Accrued Liabilities    
Salaries, wages, and commissions $ 33,463 $ 32,154
Insurance liabilities 22,344 22,506
Deferred revenue 15,719 16,139
Interest payable on long-term debt 4,134 3,966
Income taxes payable 19,360 50
Other 25,669 23,603
Total accrued liabilities $ 120,689 $ 98,418