Commitments and Contingencies - Schedule of Future Minimum Transportation and Gathering Fees (Detail) $ in Thousands	Dec. 31, 2016 USD ($)	[1]
Disclosure Commitments And Contingencies Schedule Of Future Minimum Transportation And Gathering Fees [Abstract]
2017	$ 705,243
2018	699,863
2019	699,254
2020	635,379
2021	606,797
Thereafter	3,326,015
Transportation and Gathering Contracts	$ 6,672,551

[1] The amounts in this table represent the gross amounts that we are committed to pay; however, we will record in our financial statements our proportionate share of costs based on our working interest which can vary based on volumes produced.