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Note 10 - Business Segments
 3 Months Ended
Mar. 31, 2015
Notes to Financial Statements  
Segment Reporting Disclosure [Text Block]
(10)  Business Segments
 
We have six current operating segments that have been aggregated into four reporting segments (Truckload, Dedicated, Intermodal and Brokerage) for financial reporting purposes. Information for the first quarter of 2014, which was previously aggregated into two reporting segments, has been shown in the same four segments for comparison purposes.
 
The primary source of our operating revenue is provided by our Truckload segment through a combination of regional short-haul and medium-to-long-haul full-load transportation services. We transport food and other consumer packaged goods that require a temperature-controlled or insulated environment across the United States and into and out of Mexico and Canada.
 
Our Dedicated segment provides customized transportation solutions tailored to meet individual customers’ requirements, utilizing temperature-controlled trailers, dry vans and other specialized equipment within the United States. Our customer contracts range from three to five years and are subject to annual rate reviews.
 
Our Intermodal segment transports our customers’ freight within the United States primarily utilizing our temperature-controlled trailers and also, through March 2015, our dry containers on railroad flatcars for portions of trips, with the balance of the trips using our tractors or, to a lesser extent, contracted carriers.
 
Our Brokerage segment arranges for smaller third-party carriers to transport freight for our customers in temperature-controlled trailers and dry vans within the United States and into and out of Mexico while we retain the billing, collection and customer management responsibilities.
 
The following table sets forth for the periods indicated our operating revenue and operating income by segment. We do not prepare separate balance sheets by segment and, as a result, assets are not separately identifiable by segment.
 
   
Three Months
 
   
Ended March 31,
  
(
Dollars in thousands
)
  
2015
    
2014
  
Operating revenue:
                
Truckload revenue, net of fuel surcharge revenue
   $ 86,811     $ 86,802  
Truckload fuel surcharge revenue
     14,590       23,712  
Total Truckload revenue
     101,401       110,514  
                 
Dedicated revenue, net of fuel surcharge revenue
     19,863       10,728  
Dedicated fuel surcharge revenue
     2,591       2,822  
Total Dedicated revenue
     22,454       13,550  
                 
Intermodal revenue, net of fuel surcharge revenue
     17,019       18,354  
Intermodal fuel surcharge revenue
     3,373       5,336  
Total Intermodal revenue
     20,392       23,690  
                 
Brokerage revenue
     17,040       11,655  
                 
Total operating revenue
   $ 161,287     $ 159,409  
                 
Operating income:
                
Truckload
   $ 9,602     $ 6,178  
Dedicated
     2,004       1,322  
Intermodal
     1,251       483  
Brokerage
     742       657  
Total operating income before gain on
disposition of facility
     13,599       8,640  
Gain on disposition of facility
     3,712       -  
Total operating income
   $ 17,311     $ 8,640  
 
             Truckload segment depreciation expense was $13.2 million and $13.3 million, Dedicated segment depreciation expense was $2.9 million and $1.5 million, Intermodal segment depreciation expense was $1.5 million and $1.4 million, and Brokerage segment depreciation expense was $270,000 and $224,000, in the three-month periods ended March 31, 2015 and March 31, 2014, respectively.