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Financial Statement Presentation (Tables) | 6 Months Ended
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Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles | The following table presents revenues disaggregated by product:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(In thousands) |  | 2018 |  | 2017(1) |  | 2018 |  | 2017(1)
OPERATING REVENUES |  |  |  |  |  |  |  |
Natural gas |  | $ | 364,660 |  |  | $ | 395,328 |  |  | $ | 776,768 |  |  | $ | 828,770 |
Crude oil and condensate |  | — |  |  | 44,625 |  |  | 48,722 |  |  | 87,616 |
Brokered natural gas |  | 92,576 |  |  | 4,037 |  |  | 97,526 |  |  | 8,732 |
Other |  | (121 | ) |  | 2,662 |  |  | 1,749 |  |  | 5,994 |
Total revenues from contracts with customers |  | 457,115 |  |  | 446,652 |  |  | 924,765 |  |  | 931,112 |
Gain (loss) on derivative instruments |  | (3,668 | ) |  | 13,805 |  |  | 1,909 |  |  | 47,190 |
Total operating revenues |  | $ | 453,447 |  |  | $ | 460,457 |  |  | $ | 926,674 |  |  | $ | 978,302 |
_______________________________________________________________________________
(1) | As noted above, prior period amounts have not been adjusted under the modified retrospective method.

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