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Derivative Instruments and Hedging Activities - Narrative (Details) $ in Thousands | Nov. 07, 2024 | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($) instrument | Sep. 30, 2023 USD ($) instrument
--- | --- | --- | --- | ---
Bank Term Funding Program Advance |  |  |  |
Derivative [Line Items] |  |  |  |
Weighted average interest rate (in percent) |  | 4.76% |  |
Certificates of Deposit | Subsequent Event |  |  |  |
Derivative [Line Items] |  |  |  |
Weighted average interest rate (in percent) | 4.70% |  |  |
Fair Value Swap | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount |  | $ 300,000 | $ 300,000 | $ 300,000
Fair Value Swap | Fair Value Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Number of instruments held | instrument |  |  |  | 2
Fair Value Swap, 1 | Fair Value Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount |  |  |  | $ 250,000
Fair Value Swap, 2 | Fair Value Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount |  |  |  | $ 50,000
Interest Rate Swap |  |  |  |
Derivative [Line Items] |  |  |  |
Amount of hedged item |  | 20,000 |  |
Interest Rate Swap | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Number of instruments held | instrument |  |  | 2 |
Notional amount |  | $ 125,000 |  |
Fixed interest rate (in percent) |  | 3.29% |  |
Interest Rate Swap 1 | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount |  |  | $ 100,000 |
Interest Rate Swap 2 | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount |  |  | $ 75,000 |

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