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Derivatives - Summary of Interest Rate Swap Transactions (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Derivatives Fair Value [Line Items] |  |
Swap assets | $ 8,196 | $ 12,481
Accrued Liabilities and Other Liabilities | 8,196 | 12,481
Long [Member] | Interest Rate Swap [Member] |  |
Derivatives Fair Value [Line Items] |  |
Interest Rate Swaps With Loan Customers In An Asset Position Notional Amount | 78,808 | 44,773
Fair Value Of Interest Rate Swaps With Loan Customers In An Asset Position | 3,128 | 2,114
Short [Member] | Interest Rate Swap [Member] |  |
Derivatives Fair Value [Line Items] |  |
Interest Rate Swaps With Loan Customers In A Liability Position Notional Amount | 148,863 | 184,100
Fair Value Of Interest Rate Swaps With Loan Customers In A Liability Position | 8,196 | 12,481
Short [Member] | Financial Institutions [Member] |  |
Derivatives Fair Value [Line Items] |  |
Counterparty Positions With Financial Institutions In An Asset Position Notional Amount | 227,671 | 228,873
Fair Value Of Counterparty Positions With Financial Institutions In An Asset Position | $ 5,068 | $ 10,367

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