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Revenues
 9 Months Ended
Sep. 30, 2020
Revenues [Abstract]  
Revenues
(4)
Revenues


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
  


Contract Assets and Liabilities. Contract liabilities represent advance consideration received from customers, and are recognized as revenue over time as the related performance obligation is satisfied. Revenues recognized in the 2020 and 2019 first nine months that were included in the opening contract liability balances were $37,153,000 and $75,105,000, respectively. The Company presents all contract liabilities within the deferred revenues financial statement caption on the balance sheets.  The Company did not have any contract assets at September 30, 2020  or December 31, 2019.


The Company applies the practical expedient that allows non-disclosure of information about remaining performance obligations that have original expected durations of one year or less.