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SEGMENT INFORMATION - Revenue and Gross Margin by Reportable Segment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenue and other financial information by reportable segment      
Revenue $ 845,568 $ 781,461 $ 874,970
Gross margin 426,084 422,544 497,777
Capital expenditures 239,867 97,885 140,302
Contract Operations      
Revenue and other financial information by reportable segment      
Revenue 677,801 648,311 738,918
Gross margin 398,903 403,825 477,831
Aftermarket Services      
Revenue and other financial information by reportable segment      
Revenue 167,767 133,150 136,052
Gross margin 27,181 18,719 19,946
Operating | Contract Operations      
Revenue and other financial information by reportable segment      
Capital expenditures 237,246 94,863 133,492
Operating | Aftermarket Services      
Revenue and other financial information by reportable segment      
Capital expenditures 1,964 2,675 5,308
Corporate      
Revenue and other financial information by reportable segment      
Capital expenditures $ 657 $ 347 $ 1,502