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Note 3 - Segment Information (Details) - Segment Information (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Total Revenues:
Total revenue	$ 160,957	$ 164,731
Operating Income (Loss):
Operating income (loss)	354	(715)
Operating Segments [Member] \| Truckload [Member]
Total Revenues:
Total revenue	150,254	157,522
Operating Income (Loss):
Operating income (loss)	451	3,171
Operating Segments [Member] \| Other Segments [Member]
Total Revenues:
Total revenue	10,703	7,209
Operating Income (Loss):
Operating income (loss)	541	(267)
Corporate, Non-Segment [Member]
Operating Income (Loss):
Operating income (loss)	$ (638)	$ (3,619)