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Derivative Financial Instruments and Hedging Activities - Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Derivative [Line Items] |  |
Amortized cost | $ 271,400 |
Securities AFS |  |
Derivative [Line Items] |  |
Amortized cost of hedged assets | 991,699 | $ 487,486
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Items | 3,581 | 13,642
Amortized cost | 625,900 |
Cumulative increase (decrease) | 1,200 |
Hedged layer, amount | 201,000 |
Reclassification for discontinuance, before tax | (4,600) | 0
Loans |  |
Derivative [Line Items] |  |
Amortized cost of hedged assets | 271,383 | 0
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Items | (385) | 0
Cumulative increase (decrease) | 385 |
Hedged layer, amount | 155,000 |
Reclassification for discontinuance, before tax | $ (4,200) | $ 0

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