Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from Contract with Customer, Excluding Assessed Tax	$ 207,267	$ 187,561	$ 289,812	$ 290,162
Contract with Customer, Asset, after Allowance for Credit Loss	0	0	0	0
Contract with Customer, Liability, Revenue Recognized	1,202	712	2,937	1,061
Fleet Upfit Sales [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 337	$ 549	$ 628	$ 85