Note 5 - Segment Reporting (Detail) - Amortization and Depreciation by Reporting Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Depreciation and Amortization by Segments	$ 11,237	$ 12,390	$ 33,571	$ 37,491
Trucking [Member]
Depreciation and Amortization by Segments	10,530	11,643	31,403	35,372
SCS [Member]
Depreciation and Amortization by Segments	32	21	91	51
Intermodal [Member]
Depreciation and Amortization by Segments	79	129	276	316
Corporate and Other [Member]
Depreciation and Amortization by Segments	$ 596	$ 597	$ 1,801	$ 1,752