Risk Management and Derivative Instruments - Gross Fair Value of Derivative Instruments by Appropriate Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Net recorded fair value	$ 527	$ 0
Liability Derivatives, Net recorded fair value	79,961	53,144
Liability Derivatives, Net recorded fair value	14,659	9,664
Short-Term Derivative Instruments [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Total assets	10,235	4,804
Asset Derivatives, Netting arrangements	(9,708)	(4,804)
Asset Derivatives, Net recorded fair value	527	0
Liability Derivatives, Gross fair value	89,669	57,948
Liability Derivatives, Netting arrangements	(9,708)	(4,804)
Liability Derivatives, Net recorded fair value	79,961	53,144
Short-Term Derivative Instruments [Member] | Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Total assets	9,708	4,804
Liability Derivatives, Gross fair value	89,669	57,325
Short-Term Derivative Instruments [Member] | Interest Rate Swaps [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Total assets	527	0
Liability Derivatives, Gross fair value	0	623
Long-Term Derivative Instruments [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Total assets	3,573	3,163
Asset Derivatives, Netting arrangements	(3,573)	(3,163)
Asset Derivatives, Net recorded fair value	0	0
Liability Derivatives, Gross fair value	18,232	12,827
Liability Derivatives, Netting arrangements	(3,573)	(3,163)
Liability Derivatives, Net recorded fair value	14,659	9,664
Long-Term Derivative Instruments [Member] | Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Total assets	3,573	3,163
Liability Derivatives, Gross fair value	18,232	12,827
Long-Term Derivative Instruments [Member] | Interest Rate Swaps [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Total assets	0	0
Liability Derivatives, Gross fair value	$ 0	$ 0