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Revenues (Tables)
 9 Months Ended
Sep. 30, 2020
Revenues [Abstract]  
Revenues by Major Source

The following table sets forth the Company’s revenues by major source (in thousands):

  
Three months ended September 30,
    
Nine months ended September 30,
  
   
2020
    
2019
    
2020
    
2019
  
Marine transportation segment:
                        
Inland transportation
  
$
247,647
    
$
316,000
    
$
869,224
    
$
909,247
  
Coastal transportation
    
72,955
      
96,665
      
235,622
      
275,825
  
   
$
320,602
    
$
412,665
    
$
1,104,846
    
$
1,185,072
  
Distribution and services segment:
                                
Oil and gas
  
$
48,741
    
$
118,096
    
$
158,043
    
$
540,061
  
Commercial and industrial
    
127,224
      
136,048
      
418,763
      
457,339
  
   
$
175,965
    
$
254,144
    
$
576,806
    
$
997,400