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Description of Business (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]        
Decrease in rental revenue, percentage 1.80% 6.00%    
Decrease in unit utilization, percentage 0.10% 5.20%    
Decrease in horsepower utilization, percentage 0.20% 4.50%    
Capital expenditures $ 1.0   $ 12.0 $ 69.9