Note 15 - Segment Information (Detail) - Segment Information (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue									$ 681,236	$ 658,778	$ 656,344
Intersegment revenue									(6,982)	(6,151)	(6,595)
Operating income (loss)	5,149	4,645	11,059	2,357	1,159	(9,754)	7,234	301	23,209	(1,061)	26,008
Depreciation and amortization									43,222	46,274	51,807
Goodwill at carrying value											11,539
Total assets	400,232				439,825				400,232	439,825	441,179
Capital expenditures									(13,154)	50,741	82,272
Asset-Based Truckload Services [Member]
Revenue									647,986	625,252	610,291
Operating income (loss)									34,185	10,438	35,390
Depreciation and amortization									42,015	44,825	50,821
Goodwill at carrying value											11,539
Total assets	363,223				405,699				363,223	405,699	391,510
Capital expenditures									(14,093)	49,210	81,316
Solutions [Member]
Revenue									33,250	33,526	46,053
Intersegment revenue									(6,982)	(6,151)	(6,595)
Operating income (loss)									(741)	1,687	1,462
Depreciation and amortization									26	24	23
Total assets	11,963				6,138				11,963	6,138	6,983
Capital expenditures											2
Corporate [Member]
Operating income (loss)									(10,235)	(13,186)	(10,844)
Depreciation and amortization									1,181	1,425	963
Total assets	25,046				27,988				25,046	27,988	42,686
Capital expenditures									$ 939	$ 1,531	$ 954