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Derivative Instruments and Hedging Activities - Schedule of the Carrying Amount and Associated Cumulative Basis Adjustment Related to the Application of Hedge Accounting (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Fair Value Hedges | Interest-bearing deposits |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Hedge Accounting Basis Adjustment | $ (2,469) | $ 20,466 | $ (402) | $ 8,296 |
Fair Value Hedges | Long-term debt |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Hedge Accounting Basis Adjustment | (914) | $ 20,823 | 1,004 | $ 5,427 |
Interest Rate Contract | Interest-bearing deposits | Derivatives not designated as hedging instruments |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Hedge Accounting Basis Adjustment |  |  | 464 |  | $ 1,267
Interest Rate Contract | Long-term debt | Derivatives not designated as hedging instruments |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Hedge Accounting Basis Adjustment |  |  | 8,446 |  | 9,638
Interest Rate Contract | Fair Value Hedges | Interest-bearing deposits | Designated as hedging instruments |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Carrying Amount of Assets/(Liabilities) | (1,622,618) |  | (1,622,618) |  | (2,013,504)
Hedge Accounting Basis Adjustment |  |  | 15,114 |  | (8,711)
Interest Rate Contract | Fair Value Hedges | Long-term debt | Designated as hedging instruments |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Carrying Amount of Assets/(Liabilities) | $ (749,442) |  | (749,442) |  | (546,872)
Hedge Accounting Basis Adjustment |  |  | $ 14,366 |  | $ (5,986)

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