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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 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:
| Year Ended December 31,
(In thousands) | 2018 |  | 2017(1) |  | 2016(1)
OPERATING REVENUES |  |  |  |  |
Natural gas | $ | 1,881,150 |  |  | $ | 1,506,078 |  |  | $ | 1,022,590 |
Crude oil and condensate | 48,722 |  |  | 212,338 |  |  | 151,106 |
Brokered natural gas | 209,530 |  |  | 17,217 |  |  | 13,569 |
Other | 4,314 |  |  | 11,660 |  |  | 7,362 |
Total revenues from contracts with customers | 2,143,716 |  |  | 1,747,293 |  |  | 1,194,627 |
Gain (loss) on derivative instruments | 44,432 |  |  | 16,926 |  |  | (38,950 | )
Total operating revenues | $ | 2,188,148 |  |  | $ | 1,764,219 |  |  | $ | 1,155,677 |
_______________________________________________________________________________
(1) | As noted above, prior period amounts have not been adjusted under the modified retrospective method.

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