Note 10 - Business Segments (Tables)

3 Months Ended

Mar. 31, 2013

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

	Three Months Ended March 31,
(Dollars in thousands)	2013		2012
Operating revenue:
Truckload revenue, net of fuel surcharge revenue	$	94,965	$	89,198
Truckload fuel surcharge revenue		26,769		25,253
Total Truckload revenue		121,734		114,451
Logistics revenue, net of intermodal fuel surcharge revenue(1)		37,760		33,436
Intermodal fuel surcharge revenue		4,980		3,587
Total Logistics revenue		42,740		37,023
Total operating revenue	$	164,474	$	151,474
Operating income:
Truckload	$	10,000	$	7,128
Logistics		2,538		2,391
Total operating income	$	12,538	$	9,519