Income Taxes - Summary of Net Deferred Tax Asset Reported in Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Unrealized net losses on securities	$ 15,473	$ 22,107
Provision for credit losses	22,782	20,988
Write-downs of other real estate owned	2,522	938
Deferred compensation	2,116	2,142
Stock-based compensation	2,199	1,643
Investments in partnership interests	7,260	6,056
Other	911	1,123
Gross deferred tax assets	53,263	54,997
Intangibles	(5,639)	(6,346)
Basis difference related to tax credits	(5,462)	(4,118)
Depreciation	(21,833)	(20,360)
Prepaid expense deducted	(1,243)	(1,139)
Other	(181)	(283)
Gross deferred tax liabilities	(34,358)	(32,246)
Net deferred tax asset	$ 18,905	$ 22,751