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Reconciliation of Segment Information, Revenue and Other Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Sales Revenue, Services, Other | $ 13,053 | $ 7,766
Revenue, Net | 646,062 | 491,973
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (87,291) | (67,091)
Depreciation, Depletion and Amortization | 148,753 | 154,988
Segment Reporting - Capital Expenditures | 112,978 | 77,656
Total Revenue and Other Income | 698,709 | 532,828
Total Reportable Segments [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (32,487) | 195
Other Segments [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Equity Method Investments | 2,778 | 3,594
Sales Revenue, Services, Other | 13,053 | 7,766
Revenue, Net | 17,627 | 7,766
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (50,230) | (66,862)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest | (6,619) | (16,997)
Depreciation, Depletion and Amortization | 11,104 | 8,007
Segment Reporting - Capital Expenditures | 4,067 | 1,890
Excludes Gas Segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Interest Income (Expense), Net and Other Non-operating Activity | (44,433) | (49,865)
Related Party Transaction, Expenses from Transactions with Related Party | 4,574 | (424)
Corporate Adjustments And Eliminations [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Gain (Loss) Estimates on Extinguishment of Debt | 822 | 0
Intersegment Eliminations [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Sales Revenue, Services, Other | 0 | 0
Revenue, Net | (4,574) | (424)
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (4,574) | (424)
Depreciation, Depletion and Amortization | 0 | 0
Segment Reporting - Capital Expenditures | 0 | 0
Gas Segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Equity Method Investments | 194,607 | 248,034
Sales Revenue, Services, Other | 0 | 0
Revenue, Net | 304,279 | 245,357
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (93,502) | (22,879)
Depreciation, Depletion and Amortization | 95,348 | 105,715
Segment Reporting - Capital Expenditures | 100,793 | 62,862
Coalbed Methane [Member] | Gas Segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Sales Revenue, Services, Other | 0 | 0
Revenue, Net | 49,428 | 61,465
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 3,608 | 12,606
Utica Shale [Member] | Gas Segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Sales Revenue, Services, Other | 0 | 0
Revenue, Net | 50,980 | 44,270
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 17,807 | 3,256
Other Gas [Member] | Gas Segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Sales Revenue, Services, Other | 0 | 0
Revenue, Net | 47,361 | (5,080)
Income (Loss) from Continuing Operations before Income Taxes, Domestic | $ (144,886) | $ (58,223)

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