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Derivatives - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 1 Months Ended |
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Jun. 30, 2013 Mississippian Trust I | Jun. 30, 2013 Permian Trust | Jun. 30, 2013 Mississippian Trust II | Apr. 30, 2013 Interest Rate Swap | Apr. 30, 2013 Senior Floating Rate Notes due 2014 Fixed To Floating Interest Rate Swap Through April 1st 2013
Derivative Instruments and Hedging Activities Disclosure |  |  |  |  |
Notional amount of interest rate derivatives |  |  |  |  | $ 350.0
Derivative, fixed interest rate |  |  |  |  | 6.69%
Contract period end |  |  |  | Apr. 01, 2013 |
Derivative agreement effective date | Apr. 01, 2011 | Aug. 01, 2011 | Apr. 01, 2012 |  |
Commodity derivative contracts covering volumes of oil and gas production, date | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014 |  |

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- Definition Agreement effective date. + References No definition available. + Details
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- Details
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- Definition Date through which commodity derivatives cover oil and natural gas production for Trust. + References No definition available. + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 + Details
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