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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Investments in Affordable Housing Projects [Abstract]
Current recorded investment included in other assets	$ 212,689		$ 212,689		$ 128,765
Commitments to fund qualified affordable housing projects included in recorded investment noted above	154,468		154,468		$ 84,145
Tax credits and benefits recognized	3,305	$ 2,334	6,567	$ 4,655
Amortization expense included in income tax expense	$ 2,811	$ 1,887	$ 5,577	$ 3,730