Financial Derivative Instruments (Details)	Sep. 30, 2024 USD ($) derivative	Dec. 31, 2023 USD ($) derivative	Sep. 30, 2023 USD ($) derivative
Interest rate swap agreements | Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 225,000,000	$ 245,000,000	$ 255,000,000
Fair Value	(2,634,000)	(1,769,000)	2,489,000
Customer loan interest swap agreements
Derivative [Line Items]
Collateral posted	0
Cash Flow Hedging | Interest rate swap agreements | Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	75,000,000	95,000,000	105,000,000
Fair Value	$ (172,000)	380,000	1,784,000
Cash Flow Hedging | Interest Rate Swap October 27 2023 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	2.498%
Cash Flow Hedging | Interest Rate Swap October 27 2023 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 0	0	10,000,000
Fair Value	$ 0	0	20,000
Cash Flow Hedging | Interest Rate Swap January 27 2024 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	2.576%
Cash Flow Hedging | Interest Rate Swap January 27 2024 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 0	10,000,000	10,000,000
Fair Value	$ 0	22,000	92,000
Cash Flow Hedging | Interest Rate Swap April 27 2024 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	2.619%
Cash Flow Hedging | Interest Rate Swap April 27 2024 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 0	10,000,000	10,000,000
Fair Value	$ 0	86,000	159,000
Cash Flow Hedging | Interest Rate Swap January 01 2026 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	3.836%
Cash Flow Hedging | Interest Rate Swap January 01 2026 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 75,000,000	75,000,000	75,000,000
Fair Value		$ 272,000	$ 1,513,000
Cash Flow Hedging | Interest Rate Swap January 01 2026 | Designated as Hedging Instrument | Other Liabilities
Derivative [Line Items]
Fair Value	$ (172,000)
Cash Flow Hedging | Customer loan interest swap agreements | Designated as Hedging Instrument
Derivative [Line Items]
Number of Positions | derivative	8	7	6
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 85,270,000	$ 82,668,000	$ 73,144,000
Fair Value	$ 0	$ 0	$ 0
Number of Positions | derivative	16	14	12
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Pay Fixed, Receive Variable
Derivative [Line Items]
Notional Amount	$ 42,635,000	$ 41,334,000	$ 36,572,000
Fair Value	$ 3,204,000	$ 4,170,000	$ 6,031,000
Number of Positions | derivative	8	7	6
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Receive Fixed, Pay Variable
Derivative [Line Items]
Notional Amount	$ 42,635,000	$ 41,334,000	$ 36,572,000
Fair Value	$ (3,204,000)	$ (4,170,000)	$ (6,031,000)
Number of Positions | derivative	8	7	6
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Assets | Pay Fixed, Receive Variable
Derivative [Line Items]
Notional Amount	$ 34,988,000	$ 36,286,000	$ 36,572,000
Fair Value	$ 3,478,000	$ 4,259,000	$ 6,031,000
Number of Positions | derivative	6	6	6
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Assets | Receive Fixed, Pay Variable
Derivative [Line Items]
Notional Amount	$ 7,647,000	$ 5,048,000	$ 0
Fair Value	$ 274,000	$ 89,000	$ 0
Number of Positions | derivative	2	1	0
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Liabilities | Pay Fixed, Receive Variable
Derivative [Line Items]
Notional Amount	$ 7,647,000	$ 5,048,000	$ 0
Fair Value	$ (274,000)	$ (89,000)	$ 0
Number of Positions | derivative	2	1	0
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Liabilities | Receive Fixed, Pay Variable
Derivative [Line Items]
Notional Amount	$ 34,988,000	$ 36,286,000	$ 36,572,000
Fair Value	$ (3,478,000)	$ (4,259,000)	$ (6,031,000)
Number of Positions | derivative	6	6	6
Fair Value Hedging | Interest rate swap agreements | Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	$ 150,000,000	$ 150,000,000	$ 150,000,000
Fair Value	$ (2,462,000)	(2,149,000)	705,000
Fair Value Hedging | Interest Rate Swap March 01 2026 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	4.712%
Fair Value Hedging | Interest Rate Swap March 01 2026 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 40,000,000	40,000,000	40,000,000
Fair Value			63,000
Fair Value Hedging | Interest Rate Swap March 01 2026 | Designated as Hedging Instrument | Other Liabilities
Derivative [Line Items]
Fair Value	$ (601,000)	(581,000)
Fair Value Hedging | Interest Rate Swap March 01 2027 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	4.402%
Fair Value Hedging | Interest Rate Swap March 01 2027 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 30,000,000	30,000,000	30,000,000
Fair Value			120,000
Fair Value Hedging | Interest Rate Swap March 01 2027 | Designated as Hedging Instrument | Other Liabilities
Derivative [Line Items]
Fair Value	$ (710,000)	(598,000)
Fair Value Hedging | Interest Rate Swap March 01 2028 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	4.189%
Fair Value Hedging | Interest Rate Swap March 01 2028 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 30,000,000	30,000,000	30,000,000
Fair Value			250,000
Fair Value Hedging | Interest Rate Swap March 01 2028 | Designated as Hedging Instrument | Other Liabilities
Derivative [Line Items]
Fair Value	$ (858,000)	(678,000)
Fair Value Hedging | Interest Rate Swap August 01 2025 | Designated as Hedging Instrument
Derivative [Line Items]
Fixed Rate Paid	4.703%
Fair Value Hedging | Interest Rate Swap August 01 2025 | Designated as Hedging Instrument | Other Assets
Derivative [Line Items]
Notional Amount	$ 50,000,000	50,000,000	50,000,000
Fair Value			$ 272,000
Fair Value Hedging | Interest Rate Swap August 01 2025 | Designated as Hedging Instrument | Other Liabilities
Derivative [Line Items]
Fair Value	$ (293,000)	$ (292,000)