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Derivative Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2025
Derivative Financial Instruments |
Summary of notional amounts and fair values of derivatives held | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 | ​ | December 31, 2024
​ | ​ | ​ | ​ | ​ | Fair Value | ​ | ​ | ​ | ​ | Fair Value
​ | ​ | Notional | ​ | Asset | ​ | Liability | ​ | Notional | ​ | Asset | ​ | Liability
(dollars in thousands) |  | Amount |  | Derivatives(1) |  | Derivatives(2) |  | Amount |  | Derivatives(1) |  | Derivatives(2)
Derivatives designated as hedging instruments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swaps | ​ | $ | 60,938 | ​ | $ | 8,011 | ​ | $ | — | ​ | $ | 63,750 | ​ | $ | 8,780 | ​ | $ | —
Interest rate collars | ​ | ​ | 100,000 | ​ | ​ | 105 | ​ | ​ | — | ​ | ​ | 200,000 | ​ | ​ | — | ​ | ​ | (115)
Interest rate floors | ​ | ​ | 300,000 | ​ | ​ | 2,267 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Derivatives not designated as hedging instruments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swaps | ​ | ​ | 2,781,990 | ​ | ​ | 10,743 | ​ | ​ | (10,744) | ​ | ​ | 2,491,036 | ​ | ​ | 4,818 | ​ | ​ | (5,990)
Visa derivative | ​ | ​ | 73,920 | ​ | ​ | — | ​ | ​ | (2,300) | ​ | ​ | 66,606 | ​ | ​ | — | ​ | ​ | (2,300)
Foreign exchange contracts | ​ | ​ | 4,720 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 198 | ​ | ​ | — | ​ | ​ | —
(1) | The positive fair values of derivative assets are included in other assets.
(2) | The negative fair values of derivative liabilities are included in other liabilities.
Schedule of net gains and losses recognized in income related to derivatives in fair value hedging relationships | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gains (losses) recognized in | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | the consolidated statements | ​ | September 30, | ​ | September 30,
(dollars in thousands) |  | of income line item |  | 2025 |  | 2024 |  | 2025 |  | 2024
Gains (losses) on fair value hedging relationships recognized in interest income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Recognized on interest rate swap | ​ | Loans and lease financing | ​ | $ | (901) | ​ | $ | (3,109) | ​ | $ | (769) | ​ | $ | (2,948)
Recognized on hedged item | ​ | Loans and lease financing | ​ | ​ | 903 | ​ | ​ | 3,117 | ​ | ​ | 773 | ​ | ​ | 2,945
Schedule of amounts related to cumulative basis adjustments for fair value hedges | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Cumulative Amount of Fair Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Hedging Adjustment Included in the
​ | ​ | Carrying Amount of the Hedged Asset | ​ | Carrying Amount of the Hedged Asset
(dollars in thousands) |  | September 30, 2025 |  | December 31, 2024 |  | September 30, 2025 |  | December 31, 2024
Line item in the consolidated balance sheets in which the hedged item is included | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans and leases | ​ | $ | 52,884 | ​ | $ | 54,923 | ​ | $ | (8,054) | ​ | $ | (8,827)
Summary of effect of cash flow hedging relationships | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
(dollars in thousands) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Pretax net gains (losses) recognized in OCI - included component | ​ | $ | (156) | ​ | $ | 501 | ​ | $ | 193 | ​ | $ | (325)
Pretax net gains (losses) recognized in OCI - excluded component | ​ | ​ | (593) | ​ | ​ | — | ​ | ​ | (620) | ​ | ​ | —
Total pretax net gains (losses) recognized in OCI on cash flow derivative hedges | ​ | $ | (749) | ​ | $ | 501 | ​ | $ | (427) | ​ | $ | (325)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pretax net losses (gains) reclassified from AOCI into income - included component(1) | ​ | $ | — | ​ | $ | 7 | ​ | $ | — | ​ | $ | 1,825
Pretax net losses (gains) reclassified from AOCI into income - excluded component(1) | ​ | ​ | 126 | ​ | ​ | — | ​ | ​ | 200 | ​ | ​ | —
Total pretax net losses (gains) reclassified from AOCI into income(1) | ​ | $ | 126 | ​ | $ | 7 | ​ | $ | 200 | ​ | $ | 1,825
(1) Losses (gains) are reclassified from AOCI into interest income from loans and lease financing.
Summary of impact on pretax earnings of derivatives not designated as hedges | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net losses recognized | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | in the consolidated statements | ​ | September 30, | ​ | September 30, | ​
(dollars in thousands) |  | of income line item | ​ | 2025 |  | 2024 |  | 2025 |  | 2024 |
Derivatives Not Designated As Hedging Instruments: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swaps | ​ | Other noninterest income | ​ | $ | — | ​ | $ | (18) | ​ | $ | (21) | ​ | $ | (49) | ​
Visa derivative | ​ | Other noninterest income | ​ | ​ | (1,500) | ​ | ​ | (2,530) | ​ | ​ | (3,695) | ​ | ​ | (5,360) | ​

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