Note 4 - Goodwill (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Domestic [Member]
Balance	[1]	$ 97,903	$ 91,011
Additions through acquisitions		966	6,892
Reduction related to divestiture		(1,218)
Balance	[1]	97,651	97,903
Import [Member]
Balance	[1]	84,384	79,601
Additions through acquisitions		1,283	5,029
Reduction related to divestiture			(246)
Balance	[1]	85,667	84,384
Luxury [Member]
Balance	[1]	30,933	28,763
Additions through acquisitions		193	2,170
Reduction related to divestiture
Balance	[1]	31,126	30,933
Balance	[1]	213,220	199,375
Additions through acquisitions		2,442	14,091
Reduction related to divestiture		(1,218)	(246)
Balance	[1]	$ 214,444	$ 213,220

[1] Net of accumulated impairment losses of $299.3 million recorded during the year ended December 31, 2008.