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Details of Selected Balance Sheet Accounts - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Details of Selected Balance Sheet Accounts [Abstract]    
Accrued compensation $ 20,924 $ 20,904
Accrued taxes, other than income taxes 7,579 5,130
Insurance liabilities 5,073 6,361
Accrued interest 3,982 3,629
Accrued commissions 2,380 2,194
Other 6,406 5,183
Accrued liabilities $ 46,344 $ 43,401