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Revenue from Contracts with Customers - Disaggregate Revenue (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
hp
Mar. 31, 2022
USD ($)
hp
Disaggregation of Revenue    
Revenue $ 229,834 $ 197,201
Contract Operations    
Disaggregation of Revenue    
Revenue 187,745 163,656
Contract Operations | Transferred at Point in Time    
Disaggregation of Revenue    
Revenue 800 200
Contract Operations | 0 - 1,000 horsepower per unit    
Disaggregation of Revenue    
Revenue $ 39,954 $ 41,842
Contract Operations | 0 - 1,000 horsepower per unit | Minimum    
Disaggregation of Revenue    
Compressor unit horsepower (horsepower) | hp 0 0
Contract Operations | 0 - 1,000 horsepower per unit | Maximum    
Disaggregation of Revenue    
Compressor unit horsepower (horsepower) | hp 1,000 1,000
Contract Operations | 1,001 - 1,500 horsepower per unit    
Disaggregation of Revenue    
Revenue $ 81,807 $ 67,001
Contract Operations | 1,001 - 1,500 horsepower per unit | Minimum    
Disaggregation of Revenue    
Compressor unit horsepower (horsepower) | hp 1,001 1,001
Contract Operations | 1,001 - 1,500 horsepower per unit | Maximum    
Disaggregation of Revenue    
Compressor unit horsepower (horsepower) | hp 1,500 1,500
Contract Operations | Over 1,500 horsepower per unit    
Disaggregation of Revenue    
Revenue $ 65,714 $ 54,594
Contract Operations | Over 1,500 horsepower per unit | Minimum    
Disaggregation of Revenue    
Compressor unit horsepower (horsepower) | hp 1,500 1,500
Contract Operations | Other    
Disaggregation of Revenue    
Revenue $ 270 $ 219
Aftermarket Services    
Disaggregation of Revenue    
Revenue 42,089 33,545
Aftermarket Services | Services    
Disaggregation of Revenue    
Revenue 21,249 17,137
Aftermarket Services | OTC parts and components sales    
Disaggregation of Revenue    
Revenue $ 20,840 $ 16,408