Note 7 - Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

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, 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 and for 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
As of and for the three months ended June 30, 2012
Revenues from external customers	$	830,773	$	5,071		$	835,844
Segment income (loss) before taxes		28,574		(15	)		28,559
Segment assets		1,858,045		27,396			1,885,441
As of and for the six months ended June 30, 2012
Revenues from external customers	$	1,603,681	$	9,492		$	1,613,173
Segment income (loss) before taxes		54,817		(182	)		54,635