Note 9 - Revenue - Disaggregated Revenue by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue	$ 1,710,703	$ 1,254,619	$ 3,202,570	$ 2,428,198
Commercial Vehicle [Member]
Revenue	1,098,255	797,269	2,033,974	1,544,988
Parts [Member]
Revenue	361,562	263,491	692,304	503,927
Commercial Vehicle Repair Service [Member]
Revenue	236,736	182,035	449,257	357,336
Financial Service [Member]
Revenue	4,578	4,549	9,067	8,453
Insurance [Member]
Revenue	3,177	2,858	6,213	5,419
Product and Service, Other [Member]
Revenue	$ 6,395	$ 4,417	$ 11,755	$ 8,075