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Derivative Instruments and Hedging Activities - Cash Flow Derivatives (Details) - Cash Flow Hedging - Designated as Hedging Instrument - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Cash Flow Hedging Derivatives |  |  |  |  |
Amount expected to be reclassified from AOCI into earnings |  |  | $ 3,700,000 |  |
Interest Rate Swaps |  |  |  |  |
Cash Flow Hedging Derivatives |  |  |  |  |
Notional Amount | $ 183,000,000 |  | $ 183,000,000 |  | $ 178,000,000
Weighted Average Pay Rate | 2.87% |  | 2.87% |  | 2.20%
Weighted Average Receive Rate | 4.30% |  | 4.30% |  | 4.80%
Weighted Average Maturity (Years) |  |  | 4 years 5 months 1 day |  | 4 years 7 days
Net Unrealized Gain |  |  | $ 636,000 |  | $ 5,139,000
Interest Rate Caps |  |  |  |  |
Cash Flow Hedging Derivatives |  |  |  |  |
Notional Amount | $ 125,000,000 |  | $ 125,000,000 |  | $ 125,000,000
Weighted Average Maturity (Years) |  |  | 4 years 7 months 2 days |  | 5 years 4 months 2 days
Unamortized Premium Paid | $ 3,688,000 |  | $ 3,688,000 |  | $ 4,281,000
Weighted Average Strike Rate | 0.96% |  | 0.96% |  | 0.96%
Amortization of interest rate cap premiums | $ 200,000 | $ 204,000 | $ 593,000 | $ 600,000 |

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