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SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION (Tables)
3 Months Ended
Mar. 31, 2019
SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION  
Schedule of operating revenues disaggregated by geographic region

 

 

 

 

 

 

 

 

 

Three Months Ended March 31, 

 

 

 

2019

 

 

2018

Operating Revenues

 

 

 

 

 

 

  United States

 

 $

37,636

 

 $

37,777

  Canada

 

 

13,528

 

 

12,103

     Total

 

 $

51,164

 

 $

49,880