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Revenue Recognition (Tables)
3 Months Ended
Mar. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue
The following table presents revenues from contracts with customers disaggregated by product:
Three Months Ended March 31,
(In thousands)20212020
   Natural gas $472,859 $370,340 
Other 59 55 
$472,918 $370,395