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Derivative Financial Instruments - Additional Information (Details)
$ in Millions
Oct. 02, 2020
USD ($)
derivative
Jun. 01, 2019
USD ($)
Dec. 31, 2021
USD ($)
derivative
Dec. 31, 2020
USD ($)
Derivative [Line Items]        
Non-trade floor plan notes payable     $ 835.9 $ 1,563.0
Amount of net losses expected to reclassify from AOCI into interest expense in earnings within the next twelve months     1.9  
Interest rate collar        
Derivative [Line Items]        
Derivative term   5 years    
Derivative, notional amount   $ 300.0    
Non-trade floor plan notes payable   $ 1,600.0    
Interest rate collar | Not Designated as Hedging Instrument        
Derivative [Line Items]        
Derivative asset     6.4  
Derivative liability     $ 6.4  
Interest Rate Cap | Not Designated as Hedging Instrument        
Derivative [Line Items]        
Derivative term 5 years      
Derivative, notional amount $ 225.0      
Number of derivative instruments held | derivative 4   4