Income Taxes - Summary of Net Deferred Tax Asset Reported in Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Unrealized net losses on securities	$ 22,107
Provision for credit losses	20,988	$ 17,654
Write-downs of other real estate owned	938	255
Deferred compensation	2,142	2,320
Stock-based compensation	1,643	1,575
Investments in partnership interests	6,056	3,840
Other	1,123	901
Gross deferred tax assets	54,997	26,545
Unrealized net gains on securities		(684)
Premium on securities of banks acquired	(98)	(120)
Intangibles	(6,346)	(5,756)
Basis difference related to tax credits	(4,118)	(2,979)
Depreciation	(20,360)	(14,545)
Prepaid expense deducted	(1,139)	(1,120)
Other	(185)	(169)
Gross deferred tax liabilities	(32,246)	(25,373)
Net deferred tax asset	$ 22,751	$ 1,172