v2.4.0.6
Summary of Gross Revenues and Expenses on Pro-Forma Basis (Detail) (USD $)
 12 Months Ended
Dec. 31, 2011
Summary Of Gross Revenues and Expenses On Proforma Basis [Line Items]  
Gross revenues $ 253,942,000
Purchased transportation 203,042,000
Purchased equipment for resale 566,000
Commissions 31,601,000
Operating expenses 12,274,000
Income from operations 6,459,000
Interest expense 520,000
Income taxes 2,284,000
Net income 3,655,000
Transportation services
  
Summary Of Gross Revenues and Expenses On Proforma Basis [Line Items]  
Gross 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
Agent support services
  
Summary Of Gross Revenues and Expenses On Proforma Basis [Line Items]  
Gross 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