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Acquisitions and Divestitures (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 10, 2017 USD ($) a well | Dec. 31, 2017 USD ($)
Additional Disclosures, Acquisitions and Divestitures |  |
Area of land acquired | a | 13,000 |
Payments to acquire land | $ 47.8 |
Number Of Wells Acquired | well | 4 |
Oil and Gas Properties | Disposal Group, Not Discontinued Operations |  |
Additional Disclosures, Acquisitions and Divestitures |  |
Cash received from sale of property |  | $ 11.3

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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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