Note 5 - Segment Reporting (Detail) - Amortization and Depreciation by Reporting Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Total Depreciation and Amortization	$ 11,178	$ 12,489	$ 22,335	$ 25,102
Trucking [Member]
Depreciation and Amortization by Segments	10,466	11,815	20,873	23,729
SCS [Member]
Depreciation and Amortization by Segments	31	17	59	31
Intermodal [Member]
Depreciation and Amortization by Segments	103	88	197	188
Corporate and Other [Member]
Depreciation and Amortization by Segments	$ 578	$ 569	$ 1,206	$ 1,154