Note 5 - Inventories - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
New commercial vehicles	$ 575,879	$ 770,861
Used commercial vehicles	71,429	86,960
Parts and accessories	187,419	201,868
Other	15,564	15,341
Less allowance	(9,987)	(13,832)
Total	$ 840,304	$ 1,061,198