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Inventories, Contracts in Progress and Vehicle Floor Plan Payable (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Inventory [Line Items]        
Weighted average interest rate 4.70% 4.90% 4.50% 5.00%
Automotive [Member]        
Inventory [Line Items]        
Borrowing capacity $ 70,900,000   $ 70,900,000  
Vehicle floor plan payable 45,700,000   45,700,000  
Floor plan assistance $ 1,100,000 $ 800,000 $ 2,000,000 $ 1,400,000
Truist Floor Plan Facility [Member] | Automotive [Member] | Secured Overnight Financing Rates (SOFR) [Member]        
Inventory [Line Items]        
Applicable interest rate margin     1.19%  
Ford Floor Plan Facility [Member] | Automotive [Member] | Prime Rate [Member]        
Inventory [Line Items]        
Applicable interest rate margin     1.50%  
Vehicle Floor Plan Facility [Member] | Automotive [Member]        
Inventory [Line Items]        
Weighted average interest rate 2.20% 1.20% 2.10% 1.20%
Minimum [Member] | Ford Floor Plan Facility [Member] | Automotive [Member] | Prime Rate [Member]        
Inventory [Line Items]        
Interest rate 3.50%   3.50%