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Supplemental Financial Information - Schedule of Other Long Term Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Other long-term assets, net:    
Right of use assets, operating leases, net $ 11,292 $ 7,734
Intangible assets, net 8,222 847
Spare parts, net 7,647 6,789
Upfront Customer Consideration 6,221 6,475
Mine development costs, net 6,629 5,478
Mine reclamation asset, net 1,591 1,641
Other 2,622 1,683
Total other long-term assets, net $ 44,224 $ 30,647