Note 8 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Stock Repurchased and Retired [Table Text Block]

	Repurchases Occurring in 2016				Cumulative Repurchases as of December 31, 2016
	Shares		Average Price		Shares		Average Price
2011 Share Repurchase Authorization		599,123	$	79.21		2,327,636	$	51.09
2016 Share Repurchase Authorization		713,725	$	79.74		713,725	$	79.74

Year Ended December 31,	2016		2015		2014
Shares repurchased pursuant to repurchase authorizations		1,312,848		228,737		226,729
Total purchase price (in thousands)	$	104,370	$	24,676	$	15,990
Average purchase price per share	$	79.50	$	107.88	$	70.52
Shares repurchased in association with tax withholdings on the vesting of RSUs		94,826		77,649		106,772

Dividends Declared [Table Text Block]

Quarter declared	Dividend amount per Class A and Class B share		Total amount of dividend (in thousands)
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
2015
First quarter	$	0.16	$	4,216
Second quarter		0.20		5,266
Third quarter		0.20		5,257
Fourth quarter		0.20		5,246
2016
First quarter	$	0.20	$	5,151
Second quarter		0.25		6,373
Third quarter		0.25		6,299
Fourth quarter		0.25		6,308

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

Year Ended December 31,	2016			2015			2014			Affected Line Item in the Consolidated Statement of Operations
Loss on cash flow hedges	$	(219	)	$	(449	)	$	(488	)	Floor plan interest expense
Income tax benefits		85			174			187		Income tax provision
Loss on cash flow hedges, net	$	(134	)	$	(275	)	$	(301	)