v2.4.0.6
Result of Operations by Segments (Detail) (USD $)
 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
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