Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details)

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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accrued Liabilities.    
Salaries, wages, and commissions $ 47,995 $ 34,584
Insurance liabilities 23,280 22,007
Employee tax-related liabilities 12,646 12,603
Deferred revenue 10,081 6,542
Sales & property taxes 7,127 6,939
Customer rebates 5,695 6,191
Interest payable on long-term debt 4,436 3,924
Other 15,257 15,159
Total accrued liabilities $ 126,517 $ 107,949