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Supplementary Data (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Other current assets:      
Prepaid expenses $ 3,829   $ 2,215
Other current assets 126   125
Total other current assets 4,005   6,404
Acquisition debt 552   521
Finance lease obligations 393   375
Operating lease obligations 1,950   1,913
Total current portion of debt and lease obligations 2,895   2,809
Accrued liabilities:      
Accrued salaries and wages 3,517   2,193
Accrued incentive compensation 3,690   19,121
Accrued vacation 3,389   3,334
Accrued insurance 4,443   4,089
Accrued interest 6,542   2,250
Accrued ad valorem and franchise taxes 1,045   450
Employer payroll tax deferral 1,773   1,773
Accrued commissions 787   684
Other accrued liabilities 463   389
Income tax payable 469   485
Federal income taxes payable 1,064   1,154
Unrecognized tax benefit 3,228   3,761
Total accrued liabilities 31,345   43,773
Other long-term liabilities:      
Incentive compensation 1,309   1,291
Total other long-term liabilities 1,309   1,419
Accrued Severance 0   128
Cash Paid For Interest And Financing Costs 927 $ 616  
Income Taxes Paid 1,540 532  
Contribution of Property 0 $ 635  
Natural disaster liability 269   2,628
Employee meetings and award trips 666   1,462
Unsettled Treasury Share Repurchases 2,784   0
Federal income taxes receivable      
Other current assets:      
Income taxes receivable $ 50   $ 4,064