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Derivatives - Summary of Interest Rate Swap Transactions (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Derivatives Fair Value [Line Items] |  |
Swap assets | $ 19,784 | $ 16,579
Accrued Liabilities and Other Liabilities | 19,784 | 16,579
Long [Member] | Interest Rate Swap [Member] |  |
Derivatives Fair Value [Line Items] |  |
Interest Rate Swaps With Loan Customers In An Asset Position Notional Amount | 2,250 | 6,980
Fair Value Of Interest Rate Swaps With Loan Customers In An Asset Position | 11 | 269
Short [Member] | Interest Rate Swap [Member] |  |
Derivatives Fair Value [Line Items] |  |
Interest Rate Swaps With Loan Customers In A Liability Position Notional Amount | 204,975 | 205,590
Fair Value Of Interest Rate Swaps With Loan Customers In A Liability Position | 19,784 | 16,579
Short [Member] | Financial Institutions [Member] |  |
Derivatives Fair Value [Line Items] |  |
Counterparty Positions With Financial Institutions In An Asset Position Notional Amount | 207,225 | 212,570
Fair Value Of Counterparty Positions With Financial Institutions In An Asset Position | $ 19,773 | $ 16,310

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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