Note 7 - Floor Plan Notes Payable and Lines of Credit - Assets Pledged as Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Feb. 02, 2024	Dec. 31, 2023	Dec. 31, 2022
Inventories, new and used vehicles at cost based on specific identification, net of allowance	$ 1,787,744		$ 1,801,447
Total	4,617,547		4,364,241	$ 3,821,066
Floor Plan Notes Payable	$ 1,081,199	$ 1,081,199	1,139,744
Asset Pledged as Collateral [Member] | Floor Plan Notes Payable [Member]
Inventories, new and used vehicles at cost based on specific identification, net of allowance		1,427,196	1,423,521
Vehicle sale related accounts receivable		197,186	119,575
Total		$ 1,624,382	$ 1,543,096