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Industry Segment Results (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Total Revenue and Other Income | $ 698,709 | $ 532,828 |
Natural Gas, NGLs and Oil Sales | 317,763 | 181,255 |
Revenue, Net | 646,062 | 491,973 |
Sales-Outside | 634,211 | 407,419 |
Gain (Loss) on Hedging Activity | (22,463) | 55,060 |
Sales Revenue, Services, Other | 13,053 | 7,766 |
Revenue from Purchased Oil and Gas | 8,979 | 8,618 |
Freight-Outside | 12,282 | 13,110 |
Segment Reporting - Intersegment Transfers | 0 | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (87,291) | (67,091) |
Total Assets | 9,063,769 | 10,715,874 | $ 9,183,981
Depreciation, Depletion and Amortization | 148,753 | 154,988 |
Segment Reporting - Capital Expenditures | 112,978 | 77,656 |
Income (Loss) from Equity Method Investments | 12,330 | 16,665 |
Total Reportable Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (32,487) | 195 |
Gas Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Natural Gas, NGLs and Oil Sales | 317,763 | 181,255 |
Revenue, Net | 304,279 | 245,357 |
Gain (Loss) on Hedging Activity | (22,463) | 55,060 |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 8,979 | 8,618 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | 0 | 424 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (93,502) | (22,879) |
Total Assets | 6,074,299 | 6,814,568 |
Depreciation, Depletion and Amortization | 95,348 | 105,715 |
Segment Reporting - Capital Expenditures | 100,793 | 62,862 |
Income (Loss) from Equity Method Investments | 12,140 | 15,598 |
Equity Method Investments | 194,607 | 248,034 |
Gas Segment [Member] | Marcellus Shale [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Natural Gas, NGLs and Oil Sales | 189,175 | 96,138 |
Revenue, Net | 156,510 | 144,702 |
Gain (Loss) on Hedging Activity | (32,665) | 48,564 |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 0 | 0 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | 0 | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 29,969 | 19,482 |
Gas Segment [Member] | Utica Shale [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Natural Gas, NGLs and Oil Sales | 53,668 | 34,261 |
Revenue, Net | 50,980 | 44,270 |
Gain (Loss) on Hedging Activity | (2,688) | 10,009 |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 0 | 0 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | 0 | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 17,807 | 3,256 |
Gas Segment [Member] | Coalbed Methane [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Natural Gas, NGLs and Oil Sales | 58,626 | 41,920 |
Revenue, Net | 49,428 | 61,465 |
Gain (Loss) on Hedging Activity | (9,198) | 19,121 |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 0 | 0 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | 0 | 424 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 3,608 | 12,606 |
Gas Segment [Member] | Other Gas [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Natural Gas, NGLs and Oil Sales | 16,294 | 8,936 |
Revenue, Net | 47,361 | (5,080) |
Gain (Loss) on Hedging Activity | 22,088 | (22,634) |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 8,979 | 8,618 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | 0 | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (144,886) | (58,223) |
Coal Segment [Member] | PA Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Reporting - Intersegment Transfers | 0 |  |
PA Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue, Net | 328,730 | 239,274 |
Sales-Outside | 316,448 | 226,164 |
Gain (Loss) on Hedging Activity | 0 | 0 |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 0 | 0 |
Freight-Outside | 12,282 | 13,110 |
Segment Reporting - Intersegment Transfers |  | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 61,015 | 23,074 |
Total Assets | 1,955,172 | 2,078,559 |
Depreciation, Depletion and Amortization | 42,301 | 41,266 |
Segment Reporting - Capital Expenditures | 8,118 | 12,904 |
Other Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue, Net | 17,627 | 7,766 |
Sales-Outside | 0 | 0 |
Gain (Loss) on Hedging Activity | 0 | 0 |
Sales Revenue, Services, Other | 13,053 | 7,766 |
Revenue from Purchased Oil and Gas | 0 | 0 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | 4,574 | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (50,230) | (66,862) |
Total Assets | 1,029,724 | 1,295,011 |
Depreciation, Depletion and Amortization | 11,104 | 8,007 |
Segment Reporting - Capital Expenditures | 4,067 | 1,890 |
Income (Loss) from Equity Method Investments | 190 | 1,067 |
Equity Method Investments | 2,778 | 3,594 |
Intersegment Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue, Net | (4,574) | (424) |
Sales-Outside | 0 | 0 |
Gain (Loss) on Hedging Activity | 0 | 0 |
Sales Revenue, Services, Other | 0 | 0 |
Revenue from Purchased Oil and Gas | 0 | 0 |
Freight-Outside | 0 | 0 |
Segment Reporting - Intersegment Transfers | (4,574) | (424) |
Income (Loss) from Continuing Operations before Income Taxes, Domestic | (4,574) | (424) |
Total Assets | 4,574 | 527,736 |
Depreciation, Depletion and Amortization | 0 | 0 |
Segment Reporting - Capital Expenditures | $ 0 | $ 0 |

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