v2.4.0.6

Result of Operations by Segments (Detail) (USD $)	3 Months Ended								12 Months Ended
Result of Operations by Segments (Detail) (USD $)	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
Segment Reporting Information [Line Items]
Total revenues	$ 75,318,000	$ 71,856,000	$ 69,197,000	$ 61,800,000	$ 72,167,000	$ 85,359,000	$ 86,965,000	$ 75,479,000	$ 278,171,000	$ 319,970,000
Purchased transportation									221,366,000	259,493,000
Purchased equipment for resale									1,178,000	566,000
Commissions									34,379,000	41,371,000
Operating expenses									13,830,000	12,108,000
Income from operations									7,418,000	6,432,000
Interest expense									323,000	520,000
Income taxes									2,739,000	2,274,000
Net income	1,050,000	1,390,000	1,085,000	831,000	1,128,000	944,000	905,000	661,000	4,356,000	3,638,000
Assets	64,404,000				59,107,000				64,404,000	59,107,000
Transportation services
Segment Reporting Information [Line Items]
Total revenues	75,072,000	70,596,000	69,033,000	61,497,000	71,436,000	85,262,000	86,438,000	74,944,000	276,198,000	318,080,000
Purchased transportation									221,366,000	259,493,000
Purchased equipment for resale									0	0
Commissions									34,379,000	41,371,000
Operating expenses									13,514,000	11,837,000
Income from operations									6,939,000	5,379,000
Interest expense									323,000	520,000
Income taxes									2,554,000	1,868,000
Net income									4,062,000	2,991,000
Assets	54,968,000				52,967,000				54,968,000	52,967,000
Agent support services
Segment Reporting Information [Line Items]
Total revenues	246,000	1,260,000	164,000	303,000	731,000	97,000	527,000	535,000	1,973,000	1,890,000
Purchased transportation									0	0
Purchased equipment for resale									1,178,000	566,000
Commissions									0	0
Operating expenses									316,000	271,000
Income from operations									479,000	1,053,000
Interest expense									0	0
Income taxes									185,000	406,000
Net income									294,000	647,000
Assets	$ 9,436,000				$ 6,140,000				$ 9,436,000	$ 6,140,000

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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