Commitments and Contingencies - Schedule of Future Minimum Transportation and Gathering Fees (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Contingencies And Commitments [Line Items]
2014	$ 227,061
2015	238,148
2016	261,854
2017	258,227
2018	228,321
Thereafter	1,363,537
Transportation and Gathering Contracts	$ 2,577,148

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The minimum commitment related to transportation agreements that must be made within the specified time period of the agreement.

No definition available.

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The minimum commitment related to transportation agreements that must be made within the current period of the agreement.

No definition available.

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The minimum commitment related to transportation agreements that must be made within the fifth year of the agreement.

No definition available.

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The minimum commitment related to transportation agreements that must be made within the fourth year of the agreement.

No definition available.

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The minimum commitment related to transportation agreements that must be made within the third year of the agreement.

No definition available.

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The minimum commitment related to transportation agreements that must be made within the second year of the agreement.

No definition available.

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The minimum commitment related to transportation agreements that must be made thereafter period of the agreement.

No definition available.

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