Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Restricted Cash and Cash Equivalents Items [Line Items]
Average balances at Federal Reserve Bank	$ 207,800	$ 115,300
Reserve requirement at Federal Reserve Bank	0
Pledging requirement for credit derivatives and SWAP agreements - cash	1,000
Designated as Hedging Instrument [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Notional amount	0	250,000
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Notional amount		250,000
2022 SWAP
Restricted Cash and Cash Equivalents Items [Line Items]
Pledging requirement for credit derivatives and SWAP agreements - cash		$ 5,800
2022 SWAP | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Notional amount	250,000
2022 SWAP | Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Notional amount	$ 250,000