Note 9 - Revenue - Disaggregated Revenue by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 1,120,655	$ 1,536,316	$ 3,291,759	$ 4,308,170
Commercial Vehicle [Member]
Revenue	711,754	1,070,868	2,060,370	2,933,952
Parts [Member]
Revenue	235,282	258,513	683,684	760,495
Commercial Vehicle Repair Service [Member]
Revenue	164,978	196,272	522,107	580,810
Financial Service [Member]
Revenue	3,107	3,570	7,986	11,223
Insurance [Member]
Revenue	2,526	2,293	7,074	7,651
Product and Service, Other [Member]
Revenue	$ 3,008	$ 4,800	$ 10,538	$ 14,039