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Revenue From Contracts With Customers (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table is a disaggregation of revenue by major source:
For the Years Ended December 31,
202020192018
Revenue from Contracts with Customers:
Natural Gas Revenue$823,132 $1,251,013 $1,391,459 
NGL Revenue64,138 104,139 165,883 
Oil/Condensate Revenue9,475 9,173 20,595 
Total Natural Gas, NGL and Oil Revenue896,745 1,364,325 1,577,937 
Purchased Gas Revenue105,792 94,027 65,986 
Other Sources of Revenue and Other Operating Income:
Gain (Loss) on Commodity Derivative Instruments 172,982 376,105 (30,212)
Other Revenue and Operating Income82,459 87,992 116,723 
Total Revenue and Other Operating Income$1,257,978 $1,922,449 $1,730,434