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Business Combinations - Acquisition of Hi-Rail (Details) - Hi-Rail - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 14, 2022
Jun. 30, 2022
Jun. 30, 2022
Business Acquisition [Line Items]      
Percentage of voting rights acquired 100.00%    
Cash consideration paid to equity interest holders $ 51.0    
Revenues   $ 4.1 $ 7.9
Pretax income (loss)   $ 0.1 $ 0.7