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Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Gain on Commodity Derivative Instruments | $ 213,913 | $ 18,005 | $ 240,118 | $ 78,752
Other Operating Income | 3,316 | 3,903 | 9,436 | 23,146
Total Revenue | 529,997 | 397,126 | 1,413,460 | 1,294,979
Natural Gas Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | 245,815 | 293,864 | 966,574 | 930,505
NGLs Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | 18,305 | 46,663 | 72,095 | 137,104
Condensate Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | 839 | 3,426 | 4,846 | 14,925
Oil Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | 92 | 759 | 347 | 2,317
Total Natural Gas, NGLs and Oil Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | 265,051 | 344,712 | 1,043,862 | 1,084,851
Purchased Gas Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | 29,192 | 10,560 | 64,181 | 38,546
Midstream Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contracts with Customers | $ 18,525 | $ 19,946 | $ 55,863 | $ 69,684

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- Definition Gain (loss) incurred in hedging activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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