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Note 8 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

Class of Treasury Stock [Table Text Block]

Year Ended December 31,		2014				2013				2012
Shares repurchased (1)			226,729				127,900				848,092
Total purchase price (in thousands)		$	15,990			$	5,213			$	20,698
Average purchase price per share		$	70.52			$	40.76			$	24.41

Schedule of Dividends Payable [Table Text Block]

Quarter declared		Dividend amount per Class A and Class B share				Total amount of dividend (in thousands)
2012
First quarter		$	0.07			$	1,815
Second quarter			0.10				2,583
Third quarter			0.10				2,545
Fourth quarter(1)			0.20				5,123
2013
First quarter		$	-			$	-
Second quarter			0.13				3,356
Third quarter			0.13				3,363
Fourth quarter			0.13				3,366
2014
First quarter		$	0.13			$	3,378
Second quarter			0.16				4,179
Third quarter			0.16				4,174
Fourth quarter			0.16				4,198

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

Year Ended December 31,		2014				2013				2012			Affected Line Item in the Consolidated Statement of Operations
Loss on cash flow hedges		$	(488	)		$	(740	)		$	(1,413	)	Floor plan interest expense
Income tax benefits			187				283				541		Income tax provision
Loss on cash flow hedges, net		$	(301	)		$	(457	)		$	(872	)

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Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date.

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