Note 11 - Effect of Derivative Instruments on Consolidated Statements of Operations (Details) - Floor Plan Interest Expense [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Rate Swap Contract, Amount of Gain Recognized in Accumulated OCI (Effective Portion)	$ 599	$ 505	$ 1,005
Loss on cash flow hedges	(449)	(488)	(740)
Interest Rate Swap Contract, Amount of Loss Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ (758)	$ (732)	$ (1,235)