Derivatives and Hedging Activities - Summary of Fair Value of Derivative Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 103,554	$ 55,276
Derivative Liabilities, Fair Value	9,375	5,997
Derivatives not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	103,506	47,458
Derivative Liabilities, Fair Value	9,375	5,997
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 48	$ 7,818