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Note 15 - Business Segments (Tables)

12 Months Ended

Dec. 31, 2013

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

(Dollars in thousands)	2013		2012		2011
Operating revenue:
Truckload revenue, net of fuel surcharge revenue	$	400,324	$	378,383	$	357,787
Truckload fuel surcharge revenue		106,955		104,940		98,060
Total Truckload revenue		507,279		483,323		455,847

Logistics revenue, net of intermodal fuel surcharge revenue⁽¹⁾		131,186		138,960		132,890
Intermodal fuel surcharge revenue		20,749		16,173		14,942
Total Logistics revenue		151,935		155,133		147,832

Total operating revenue	$	659,214	$	638,456	$	603,679

Operating income:
Truckload	$	44,865	$	36,805	$	35,298
Logistics		7,130		9,048		7,732
Total operating income	$	51,995	$	45,853	$	43,030

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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