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Financial Derivative Instruments (Details) | Sep. 30, 2023 USD ($) derivative | Dec. 31, 2022 USD ($) derivative | Sep. 30, 2022 USD ($) derivative
--- | --- | --- | ---
Customer loan interest swap agreements |  |  |
Derivative [Line Items] |  |  |
Collateral posted | $ 0 |  |
Designated as Hedging Instrument | Interest rate swap agreements |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 255,000,000 | $ 30,000,000 | $ 30,000,000
Fair Value | $ 2,489,000 | 689,000 | 633,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap October 27 2023 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 2.498% |  |
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap January 27 2024 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 2.576% |  |
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap April 27 2024 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 2.619% |  |
Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap January 01 2026 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 3.836% |  |
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swap agreements |  |  |
Derivative [Line Items] |  |  |
Derivative asset | $ 105,000,000 | 30,000,000 | 30,000,000
Fair Value | $ 1,784,000 | $ 689,000 | $ 633,000
Cash Flow Hedging | Designated as Hedging Instrument | Customer loan interest swap agreements |  |  |
Derivative [Line Items] |  |  |
Number of derivative instruments | derivative | 6 | 6 | 6
Cash Flow Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap October 27 2023 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | $ 10,000,000 | $ 10,000,000 | $ 10,000,000
Fair Value | 20,000 | 187,000 | 179,000
Cash Flow Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap January 27 2024 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 10,000,000 | 10,000,000 | 10,000,000
Fair Value | 92,000 | 233,000 | 212,000
Cash Flow Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap April 27 2024 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 10,000,000 | 10,000,000 | 10,000,000
Fair Value | 159,000 | 269,000 | 242,000
Cash Flow Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap January 01 2026 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 75,000,000 | 0 | 0
Fair Value | 1,513,000 | 0 | 0
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements |  |  |
Derivative [Line Items] |  |  |
Fair Value | $ 0 | $ 0 | $ 0
Number of derivative instruments | derivative | 12 | 12 | 12
Derivative notional amount | $ 73,144,000 | $ 74,822,000 | $ 77,256,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements | Pay Fixed, Receive Variable |  |  |
Derivative [Line Items] |  |  |
Fair Value | $ 6,031,000 | $ 4,910,000 | $ 5,365,000
Number of derivative instruments | derivative | 6 | 6 | 6
Derivative notional amount | $ 36,572,000 | $ 37,411,000 | $ 38,628,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Customer loan interest swap agreements | Receive Fixed, Pay Variable |  |  |
Derivative [Line Items] |  |  |
Fair Value | $ (6,031,000) | $ (4,910,000) | $ (5,365,000)
Number of derivative instruments | derivative | 6 | 6 | 6
Derivative notional amount | $ 36,572,000 | $ 37,411,000 | $ 38,628,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Other Assets | Customer loan interest swap agreements | Pay Fixed, Receive Variable |  |  |
Derivative [Line Items] |  |  |
Fair Value | $ 6,031,000 | $ 4,910,000 | $ 5,365,000
Number of derivative instruments | derivative | 6 | 6 | 6
Derivative notional amount | $ 36,572,000 | $ 37,411,000 | $ 38,628,000
Cash Flow Hedging | Not Designated as Hedging Instrument | Other Liabilities | Customer loan interest swap agreements | Receive Fixed, Pay Variable |  |  |
Derivative [Line Items] |  |  |
Fair Value | $ (6,031,000) | $ (4,910,000) | $ (5,365,000)
Number of derivative instruments | derivative | 6 | 6 | 6
Derivative notional amount | $ 36,572,000 | $ 37,411,000 | $ 38,628,000
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Swap March 01 2026 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.712% |  |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Swap March 01 2027 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.402% |  |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Swap March 01 2028 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.189% |  |
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Swap August 01 2025 |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.703% |  |
Fair Value Hedging | Designated as Hedging Instrument | Interest rate swap agreements |  |  |
Derivative [Line Items] |  |  |
Derivative asset | $ 150,000,000 | 0 | 0
Fair Value | 705,000 | 0 | 0
Fair Value Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap March 01 2026 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 40,000,000 | 0 | 0
Fair Value | 63,000 | 0 | 0
Fair Value Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap March 01 2027 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 30,000,000 | 0 | 0
Fair Value | 120,000 | 0 | 0
Fair Value Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap March 01 2028 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 30,000,000 | 0 | 0
Fair Value | 250,000 | 0 | 0
Fair Value Hedging | Designated as Hedging Instrument | Other Assets | Interest Rate Swap August 01 2025 |  |  |
Derivative [Line Items] |  |  |
Derivative asset | 50,000,000 | 0 | 0
Fair Value | $ 272,000 | $ 0 | $ 0

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