Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - 2016 Credit Facilities (Details)

v3.20.2
Long-Term Debt - 2016 Credit Facilities (Details) - USD ($)
3 Months Ended
Nov. 30, 2016
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
2016 Revolving Credit Facility        
Line of Credit Facility [Line Items]        
2016 Revolving Credit Facility     $ 0 $ 0
Revolving Credit Facility | 2016 Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Increase (Decrease), Net $ 25,000,000.0      
Current borrowing capacity     250,000,000.0  
Maximum borrowing capacity     300,000,000.0  
Borrowing base     196,400,000  
Letters of credit outstanding amount     13,000,000.0  
Borrowing availability amount     183,400,000  
Revolving Credit Facility | 2016 New Vehicle Floor Plan Facility and 2016 Used Vehicle Floor Plan Facility        
Line of Credit Facility [Line Items]        
Current borrowing capacity     966,000,000.0  
Maximum borrowing capacity     $ 1,216,000,000  
Maximum aggregate commitments allocated to commitments under the 2016 Used Vehicle Floor Plan Facility   40.00%    
Revolving Credit Facility | Two Thousand Sixteen Vehicle Floor Plan Facility [Member]        
Line of Credit Facility [Line Items]        
Line of Credit Facility, Increase (Decrease), Net $ 215,000,000.0