Investment Securities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) Investment	Dec. 31, 2021 USD ($) Investment	Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
Carrying value of securities pledged to secure public deposits and other contractual obligations	$ 429,400	$ 281,700
Pledging requirements for credit derivatives and SWAP agreements - securities		$ 23,000
Number of investments in non-federal issuer representing more than 10% of shareholders' equity | Investment	0	0
Maximum investment in any single non-federal issuer representing shareholders' equity	10.00%	10.00%
Unrealized loss position, fair value	$ 134,068	$ 89,837
Unrealized loss position, accumulated loss	20,659	984
Accrued interest receivable	20,900
Fair value AFS in unrealized loss with an ACL	266,810	179,992
Available-for-sale securities in unrealized loss position, accumulated loss	42,445	2,300
Debt securities in an unrealized loss, net of allowance	80,800
Debt securities unrealized accumulated loss	9,400
Securities, available-for-sale, allowance for credit loss	1,140	929
Proceeds from Sale of Debt Securities, Available-for-sale	1,530	4,636	$ 66,421
Held-to-maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Accrued interest receivable	330
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Accrued interest receivable	1,000
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Fair value AFS in unrealized loss with an ACL	500	779
Available-for-sale securities in unrealized loss position, accumulated loss	$ 1	1
Number of securities | Investment	39
Securities, available-for-sale, allowance for credit loss	$ 1,140	929	$ 869
Equity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	0	0
Other Noninterest Income [Member] | Equity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale	$ (198)	$ 161