Pro Forma Consolidated Statement Of Income (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011
Gross revenues
Total revenues	$ 253,942,000
Purchased transportation	203,042,000
Purchased equipment for resale	566,000
Commissions	31,601,000
Business acquisitions pro forma commissions impact loss	31,601,000
Operating expenses	12,274,000
Business acquisitions pro forma operating expenses impact of loss	12,274,000
Business acquisitions pro forma costs and expenses	247,483,000
Income from operations	6,459,000
Interest expense	520,000
Income before income taxes	5,939,000
Income taxes	2,284,000
Net income	3,655,000
Net income per share:
Basic	$ 0.11
Diluted	$ 0.10
Weighted average number of common shares:
Basic	33,908,000
Diluted	35,396,000
As previously reported
Gross revenues
Total revenues	319,970,000
Purchased transportation	259,493,000
Purchased equipment for resale	566,000
Commissions	41,371,000
Operating expenses	12,108,000
Business acquisitions pro forma costs and expenses	313,538,000
Income from operations	6,432,000
Interest expense	520,000
Income before income taxes	5,912,000
Income taxes	2,274,000
Net income	3,638,000
Net income per share:
Basic	$ 0.11
Diluted	$ 0.10
Weighted average number of common shares:
Basic	33,908,000
Diluted	35,396,000
Pro Forma adjustments
Gross revenues
Total revenues	(66,028,000)
Purchased transportation	(56,451,000)	[1]
Commissions	(1,545,000)	[2]
Business acquisitions pro forma commissions impact loss	(8,225,000)	[1]
Operating expenses	532,000	[3],[4],[5]
Business acquisitions pro forma operating expenses impact of loss	(366,000)	[1]
Business acquisitions pro forma costs and expenses	(66,055,000)
Income from operations	27,000
Income before income taxes	27,000
Income taxes	10,000	[6]
Net income	17,000
Transportation services
Gross revenues
Total revenues	253,038,000
Purchased transportation	203,042,000
Purchased equipment for resale	0
Commissions	31,601,000
Operating expenses	12,003,000
Income from operations	6,392,000
Interest expense	520,000
Income taxes	2,261,000
Net income	3,611,000
Transportation services | As previously reported
Gross revenues
Total revenues	318,080,000
Transportation services | Pro Forma adjustments
Gross revenues
Total revenues	(65,042,000)	[1]
Agent support services
Gross revenues
Total revenues	904,000
Purchased transportation	0
Purchased equipment for resale	566,000
Commissions	0
Operating expenses	271,000
Income from operations	67,000
Interest expense	0
Income taxes	23,000
Net income	44,000
Agent support services | As previously reported
Gross revenues
Total revenues	1,890,000
Agent support services | Pro Forma adjustments
Gross revenues
Total revenues	$ (986,000)	[7]

[1] Represents the impact of the loss of the Significant Agent's brokerage division business, as follows:

[2] Commissions paid to the Significant Agent pursuant to Agent Agreement.

[3] $512,000 represents direct operating expenses, primarily payroll and related expenses, of Truck Agent Business Unit acquired.

[4] $5,000 represents an increase in management compensation based upon an increase in income from operations.

[5] $15,000 represents amortization of acquired identifiable intangible assets.

[6] Represent an increase in federal and state taxes on income.

[7] Interest income on debt component of consideration discharged to acquire Truck Agent Business Unit.