Low Income Housing Tax Credits and Other Tax Credit Investments - Summary of the Company's Investments in Low Income Housing Projects Accounted for Using the Proportional Amortization Method (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Investments in Affordable Housing Projects [Abstract]
Current recorded investment included in other assets	$ 79,722		$ 81,035
Commitments to fund qualified affordable housing projects included in recorded investment noted above	43,287		$ 48,399
Tax credits and benefits recognized	2,321	$ 1,464
Amortization expense included in income tax expense	$ 1,843	$ 1,264