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Details of Selected Balance Sheet Accounts - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Details of Selected Balance Sheet Accounts [Abstract]    
Accrued compensation $ 16,586 $ 20,904
Accrued taxes, other than income taxes 6,758 5,130
Insurance liabilities 5,231 6,361
Accrued interest 5,337 3,629
Accrued commissions 2,502 2,194
Other 5,127 5,183
Accrued liabilities $ 41,541 $ 43,401