Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details)

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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Accrued Liabilities    
Salaries, wages, and commissions $ 30,897 $ 32,154
Insurance liabilities 23,245 22,506
Deferred revenue 15,533 16,139
Interest payable on long-term debt 9,588 3,966
Other 28,064 23,653
Total accrued liabilities $ 107,327 $ 98,418