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Business and Summary of Significant Accounting Policies - Business (Details)
Dec. 31, 2020
dealership
state
town
U.S.  
Business And Organization [Line Items]  
Number of states in which the entity operates | state 15
Number of dealerships 117
U.K.  
Business And Organization [Line Items]  
Number of towns in which the entity operates | town 33
Number of dealerships 50
Brazil  
Business And Organization [Line Items]  
Number of states in which the entity operates | state 3
Number of dealerships 17