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Supplemental Information About Oil & Natural Gas Producing Activities (Unaudited) - Principal Source of Change in Standardized Measure of Discounted Cash Flow (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Oct. 10, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Successor |  |  |  |
Changes in Standardized Measure of Discounted Future Net Cash Flows [Line Items] |  |  |  |
Standardized measure of discounted future net cash flows, beginning of period | $ 209,713 |  |  |
Sales of oil, natural gas and NGLs, net of production costs | (22,354) |  |  |
Purchase of minerals in place | 127,842 |  |  |
Divestiture of minerals in place | 0 |  |  |
Extensions and discoveries, net of future development costs | 55,825 |  |  |
Change in estimated development costs | 10,891 |  |  |
Net change in prices and production costs | (978) |  |  |
Change in estimated future development costs | 571 |  |  |
Revisions of previous quantity estimates | 20,190 |  |  |
Accretion of discount | 4,753 |  |  |
Net change in income taxes | (47,990) |  |  |
Net change in timing of production and other | 16,629 |  |  |
Standardized measure of discounted future net cash flows, end of period | 375,092 | $ 209,713 |  |
Predecessor |  |  |  |
Changes in Standardized Measure of Discounted Future Net Cash Flows [Line Items] |  |  |  |
Standardized measure of discounted future net cash flows, beginning of period | $ 209,713 | 135,069 | $ 365,883 | $ 371,307
Sales of oil, natural gas and NGLs, net of production costs |  | (49,801) | (58,534) | (102,488)
Purchase of minerals in place |  | 10,145 | 14,416 | 5,650
Divestiture of minerals in place |  | 0 | 0 | (242,344)
Extensions and discoveries, net of future development costs |  | 46,438 | 57,894 | 312,532
Change in estimated development costs |  | 11,743 | 16,100 | 10,386
Net change in prices and production costs |  | 6,661 | (494,734) | (3,027)
Change in estimated future development costs |  | 28,998 | 247,642 | 2,935
Revisions of previous quantity estimates |  | 3,673 | (51,342) | 924
Accretion of discount |  | 11,319 | 37,517 | 13,561
Net change in income taxes |  | (1,568) | 1,601 | (2,762)
Net change in timing of production and other |  | 7,036 | (1,374) | (791)
Standardized measure of discounted future net cash flows, end of period |  | $ 209,713 | $ 135,069 | $ 365,883

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- Definition Amount of decrease in standardized measure of discounted future net cash flow as a result of sales of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62500-109447 + Details
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- Definition Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of extensions, discoveries and improved recovery of proved oil and gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62500-109447 + Details
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