Fair Value Measurements - Reconciliation of the Beginning and Ending Balances for Derivative Instruments Classified as Level 3 in the Fair Value Hierarchy (Detail) - Fair Value, Inputs, Level 3 $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2020	$ (13,836)
Total losses included in earnings	(42,974)
Additions	(23,385)
Settlements	5,177
Transfers out of Level 3	4,574
Balance at September 30, 2021	$ (70,444)