Derivative Instruments and Hedging Activities - Hedging Positions (Detail) - Subsequent Event - Designated as Hedging Instrument	May. 04, 2016 MBbls $ / MMBTU $ / bbl
Fixed Price Swaps \| 2016 Hedging Position One \| Oil
Derivatives, Fair Value [Line Items]
Swap Price ($) \| $ / bbl	49.75
Daily Volume (Bbls/d)	1,000
Fixed Price Swaps \| 2016 Hedging Position One \| Natural Gas
Derivatives, Fair Value [Line Items]
Daily Volume (MMBtus/d)	10,000
Swap Price ($) \| $ / MMBTU	4.110
Fixed Price Swaps \| 2016 Hedging Position Two \| Oil
Derivatives, Fair Value [Line Items]
Swap Price ($) \| $ / bbl	52.78
Daily Volume (Bbls/d)	1,000
Fixed Price Swaps \| 2016 Hedging Position Two \| Natural Gas
Derivatives, Fair Value [Line Items]
Daily Volume (MMBtus/d)	10,000
Swap Price ($) \| $ / MMBTU	4.120
Fixed Price Swaps \| 2016 Hedging Position Three \| Oil
Derivatives, Fair Value [Line Items]
Swap Price ($) \| $ / bbl	90.00
Daily Volume (Bbls/d)	1,000
Fixed Price Swaps \| 2016 Hedging Position Three \| Natural Gas
Derivatives, Fair Value [Line Items]
Daily Volume (MMBtus/d)
Swap Price ($) \| $ / MMBTU
Costless Collar \| 2016 Hedging Position Four \| Oil
Derivatives, Fair Value [Line Items]
Daily Volume (MMBtus/d)	1,000
Floor Price ($) \| $ / MMBTU	45.00
Ceiling Price ($) \| $ / MMBTU	54.75

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

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- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Fixed price related to the price risk swap derivative.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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