Note 2 - Segment Reporting (Details) - Segment Reporting Information, by Segment (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Base revenue
Base revenue									$ 443,855	$ 408,719
Fuel surcharge revenue
Fuel surcharge revenue									111,150	103,709
Total revenue	141,417	141,822	139,738	132,027	134,771	124,416	129,569	123,673	555,005	512,428
Operating income (loss)
Operating loss	(4,692)	(204)	(945)	(2,827)	(3,781)	(8,525)	(4,329)	(6,636)	(8,667)	(23,272)
Total Assets
Total Assets	314,946				331,494				314,946	331,494
Depreciation and Amortization
Depreciation and amortization									44,947	45,058
Operating Segments [Member] | Trucking [Member]
Base revenue
Base revenue									326,734	297,624
Fuel surcharge revenue
Fuel surcharge revenue									91,867	83,920
Operating income (loss)
Operating loss									(17,667)	(29,848)
Total Assets
Total Assets	200,168				218,145				200,168	218,145
Depreciation and Amortization
Depreciation and amortization									42,366	42,165
Operating Segments [Member] | SCS [Member]
Base revenue
Base revenue									125,053	131,327
Fuel surcharge revenue
Fuel surcharge revenue									21,439	25,023
Operating income (loss)
Operating loss									9,000	6,576
Depreciation and Amortization
Depreciation and amortization									130	346
Intersegment Eliminations [Member]
Base revenue
Base revenue									(7,932)	(20,232)
Fuel surcharge revenue
Fuel surcharge revenue									(2,156)	(5,234)
Corporate, Non-Segment [Member]
Total Assets
Total Assets	114,778				113,349				114,778	113,349
Depreciation and Amortization
Depreciation and amortization									$ 2,451	$ 2,547