XML 22 R24.htm IDEA: XBRL DOCUMENT v2.4.0.8
Long-Term Debt and Financing Arrangements - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended 6 Months Ended
Jun. 30, 2014
Equipment Note [Member]
Vehicle
Jun. 30, 2014
Revolving Line of Credit Facility [Member]
Dec. 31, 2013
Revolving Line of Credit Facility [Member]
Jun. 30, 2014
Standby Letters of Credit [Member]
Debt Instrument [Line Items]        
Outstanding letters of credit       $ 6.1
Letters of credit expiration, years       2014 and 2015
Unused and available borrowings under bank revolving line of credit   43.9 44.8  
Notes, expiration, start date Jan. 15, 2019      
Notes, expiration, end date Feb. 28, 2019      
Notes, fixed interest rate, minimum 1.87%      
Notes, fixed interest rate, maximum 1.93%      
Notes, quarterly principal and interest payments $ 0.4      
Notes, number of tractors financing 200