Inventories, Contracts in Progress and Vehicle Floor Plan Payable (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Inventory [Line Items]
Weighted average interest rate	5.80%	4.30%
Automotive [Member]
Inventory [Line Items]
Borrowing capacity	$ 106,300,000
Vehicle floor plan payable	76,900,000
Floor plan assistance	$ 1,400,000	$ 900,000
Vehicle Floor Plan Facility [Member] | Automotive [Member]
Inventory [Line Items]
Weighted average interest rate	5.40%	2.00%