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Lease Obligations - Summary of lease-related assets and liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Assets    
Operating lease right-of-use assets $ 31,405 $ 20,971
Finance lease right-of-use assets $ 3,457 0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property and equipment, net of accumulated depreciation of $341,461 and $322,128, respectively  
Total right-of-use lease assets $ 34,862 20,971
Current    
Operating lease obligations 9,819 7,765
Finance lease obligations 1,161 0
Total current obligations 10,980 7,765
Non-current    
Operating lease obligations 21,606 13,230
Finance lease obligations, net of current maturities 2,551 0
Total non-current obligations 24,157 13,230
Total lease obligations $ 35,137 $ 20,995