Derivatives and Hedging Activities - Summary of Derivative Position offset in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets, Gross Amounts Recognized		$ 143	$ 90
Derivative Assets, Net Amounts Recognized		143	90
Derivative Assets, Cash Collateral Pledged (Received)	[1]	143
Derivative Asset, Net Amount			90
Derivative Liabilities, Gross Amounts Recognized		1,261	848
Derivative Liabilities, Net Amounts Recognized		1,261	848
Derivative Liabilities, Cash Collateral Pledged (Received)	[1]	1,118	758
Derivative Liabilities, Net Amount		143	90
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities, Gross Amounts Recognized	[2]	966	758
Derivative Liabilities, Net Amounts Recognized	[2]	966	758
Derivative Liabilities, Cash Collateral Pledged (Received)	[1],[2]	966	758
Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liabilities, Gross Amounts Recognized	[2]	152
Derivative Liabilities, Net Amounts Recognized	[2]	152
Derivative Liabilities, Cash Collateral Pledged (Received)	[1],[2]	152
Customer Loan Swaps - Commercial Customer [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets, Gross Amounts Recognized	[3]	143
Derivative Assets, Net Amounts Recognized	[3]	143
Derivative Assets, Cash Collateral Pledged (Received)	[1],[3]	143
Derivative Liabilities, Gross Amounts Recognized	[3]		90
Derivative Liabilities, Net Amounts Recognized	[3]		90
Derivative Liabilities, Net Amount	[3]		90
Customer Loan Swaps - Dealer Bank [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets, Gross Amounts Recognized	[3]		90
Derivative Assets, Net Amounts Recognized	[3]		90
Derivative Asset, Net Amount	[3]		$ 90
Derivative Liabilities, Gross Amounts Recognized	[3]	143
Derivative Liabilities, Net Amounts Recognized	[3]	143
Derivative Liabilities, Net Amount	[3]	$ 143

[1] The amount presented was the lesser of the amount pledged (received) or the net amount presented in the consolidated balance sheets.

[2] Interest rate swap contracts were completed with the same dealer bank. The Company maintains a master netting arrangement with the counterparty and settles collateral on a net basis for all contracts.

[3] The Company manages its net exposure on its commercial customer loan swaps by obtaining collateral as part of the normal loan policy and underwriting practices. The Company does not post collateral to its commercial customers as part of its contract.