Note 7 - Segment Information (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Truck Segment		All Other			Total
As of and for the three months ended June 30, 2014
Revenues from external customers	$	1,177,306	$	5,155		$	1,182,461
Segment income (loss) before taxes		32,112		277			32,389
Segment assets		2,321,639		31,925			2,353,564
As of the six months ended June 30, 2014
Revenues from external customers	$	2,131,936	$	9,192		$	2,141,128
Segment income (loss) before taxes		52,093		(89	)		52,004
As of and for the three months ended June 30, 2013
Revenues from external customers	$	784,573	$	5,101		$	789,674
Segment income (loss) before taxes		8,943		366			9,309
Segment assets		1,945,552		26,688			1,972,240
As of the six months ended June 30, 2013
Revenues from external customers	$	1,536,803	$	9,659		$	1,546,462
Segment income (loss) before taxes		31,091		318			31,409