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Note 3 - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Segments [Member] | Truckload [Member]
Revenues	$ 142,754	$ 157,250
Operating income (loss)	8,369	14,131
Operating Segments [Member] | Other Segments [Member]
Revenues	13,587	9,966
Operating income (loss)	1,825	337
Corporate, Non-Segment [Member]
Operating income (loss)	(2,776)	(4,425)
Revenues	156,341	167,216
Operating income (loss)	$ 7,418	$ 10,043

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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