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Acquisitions and Divestitures (Details) a in Thousands, $ in Thousands | 1 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 28, 2017 USD ($) a well | Sep. 30, 2017 USD ($)
Costs Incurred, Acquisition of Oil and Gas Properties [Abstract] |  |
Area of land acquired | a | 13 |
Payments to acquire land | $ 47,800 |
Number of wells in which a working interest was acquired | well | 4 |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  | $ 0
Disposal Group, Not Discontinued Operations | Oil and Gas Properties |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups |  |
Proceeds from sale of properties |  | $ 16,000

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- Definition The cash outflow for acquisition of land for use; excludes purchases of land held as inventory or as investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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