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Derivative Financial Instruments - Schedule of Derivative Instruments in Statement of Financial Position Related to Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Fair value hedges [line items] |  |
Fair value of closed portfolio | $ 1,500,000 | $ 1,700,000
Amortized cost of closed portfolio | 2,800,000 | 3,000,000
Designated as Hedging Instruments | Investment Securities, Available-for-Sale |  |
Fair value hedges [line items] |  |
Carrying Amount of the Hedged Assets | 1,206,340 | 999,594
Cumulative Amount of Fair Value Hedging Adjustment Included In the Carrying Amount of the Hedged Assets | 6,340 | (406)
Designated as Hedging Instruments | Loans and Leases |  |
Fair value hedges [line items] |  |
Carrying Amount of the Hedged Assets | 1,804,221 | 1,292,670
Cumulative Amount of Fair Value Hedging Adjustment Included In the Carrying Amount of the Hedged Assets | $ (2,798) | $ (7,330)

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