Inventories, Contracts in Progress and Vehicle Floor Plan Payable (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Inventory [Line Items]
Weighted average interest rate	6.00%	4.70%	5.90%	4.50%
Automotive [Member]
Inventory [Line Items]
Borrowing capacity	$ 106,300,000		$ 106,300,000
Vehicle floor plan payable	98,700,000		98,700,000
Floor plan assistance	$ 1,500,000	$ 1,100,000	$ 2,900,000	$ 2,000,000
Vehicle Floor Plan Facility [Member] | Automotive [Member]
Inventory [Line Items]
Weighted average interest rate	6.10%	2.20%	5.70%	2.10%