Derivatives and Hedging Activities - Summary of Fair Values of Derivative Financial Instruments Classification on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands		Sep. 30, 2024	Jul. 12, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets, fair value		$ 143		$ 90
Derivative liabilities, fair value		1,261		848
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities, fair value	[1]	966		758
Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities, fair value	[1]	152
Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets, notional amount		70,000
Derivative liabilities, notional amount		0	$ 10,000
Derivative liabilities, fair value		1,118
Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets, notional amount		$ 60,000		$ 60,000
Hedged Asset, Statement of Financial Position [Extensible Enumeration]		Other liabilities		Other liabilities
Derivative liabilities, notional amount		$ 0		$ 0
Derivative liabilities, fair value		$ 966		$ 758
Hedged Liability, Statement of Financial Position [Extensible Enumeration]		Other liabilities		Other liabilities
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets, notional amount		$ 10,000
Hedged Asset, Statement of Financial Position [Extensible Enumeration]		Other liabilities
Derivative liabilities, notional amount		$ 0
Derivative liabilities, fair value		$ 152
Hedged Liability, Statement of Financial Position [Extensible Enumeration]		Other liabilities
Derivatives Not Designated as Hedging Instruments [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets, fair value		$ 143		$ 90
Derivative liabilities, fair value		143		90
Derivatives Not Designated as Hedging Instruments [Member] | Customer Loan Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative assets, notional amount		4,665		4,766
Derivative assets, fair value		$ 143		$ 90
Hedged Asset, Statement of Financial Position [Extensible Enumeration]		Other assets		Other assets
Derivative liabilities, notional amount		$ 4,665		$ 4,766
Derivative liabilities, fair value		$ 143		$ 90
Hedged Liability, Statement of Financial Position [Extensible Enumeration]		Other liabilities		Other liabilities

[1] 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.