Derivative Financial Instruments - Schedule of Effects of Interest Rate Swap Agreements on Consolidated Statements of Income (Detail) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effects of derivatives on consolidated statement of income	$ 208	$ 635
Loans, Including Fees [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effects of derivatives on consolidated statement of income	57	62
Other [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effects of derivatives on consolidated statement of income	208	635
Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effects of derivatives on consolidated statement of income	$ 265	$ 697