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Segment Information
 3 Months Ended
Mar. 31, 2018
Segment Information
(6) Segment Information

The following table summarizes information about the Company’s reportable business segments as of and for the thirteen-week periods ended March 31, 2018 and April 1, 2017 (in thousands):

 

     Thirteen Weeks Ended  
     March 31, 2018      April 1, 2017  
     Transportation
Logistics		      Insurance      Total      Transportation
Logistics		      Insurance      Total  

External revenue

    $ 1,035,640      $ 12,286      $ 1,047,926      $ 769,348      $ 11,560      $ 780,908  

Internal revenue

         7,498        7,498           7,334        7,334  

Investment income

         861        861           414        414  

Operating income

      67,300        7,853        75,153        44,114        8,220        52,334  

Expenditures on long-lived assets

      3,814           3,814        4,978           4,978  

Goodwill

      39,363           39,363        31,134           31,134  

In the thirteen-week periods ended March 31, 2018 and April 1, 2017, no single customer accounted for more than 10% of the Company’s consolidated revenue.