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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table presents the changes in accumulated other comprehensive income (loss) after-tax by component:
Three months ended
($ in thousands) | Net Unrealized Loss on Available-for-Sale Securities |  | Unamortized Gain on Held-to-Maturity Securities |  | Net Unrealized Gain (Loss) on Cash Flow Hedges |  | Total
Balance, June 30, 2025 | $ | (97,979) |  |  | $ | 6,869 |  |  | $ | 2,125 |  |  | $ | (88,985) |
Net change | 21,677 |  |  | (636) |  |  | (76) |  |  | 20,965 |
Balance, September 30, 2025 | $ | (76,302) |  |  | $ | 6,233 |  |  | $ | 2,049 |  |  | $ | (68,020) |
Balance, June 30, 2024 | $ | (129,292) |  |  | $ | 9,335 |  |  | $ | (2,182) |  |  | $ | (122,139) |
Net change | 38,033 |  |  | (619) |  |  | 5,890 |  |  | 43,304 |
Balance, September 30, 2024 | $ | (91,259) |  |  | $ | 8,716 |  |  | $ | 3,708 |  |  | $ | (78,835) |
Nine months ended
($ in thousands) | Net Unrealized Gain (Loss) on Available-for-Sale Debt Securities |  | Unamortized Gain on Held-to-Maturity Securities |  | Net Unrealized Gain (Loss) on Cash Flow Hedges |  | Total
Balance, December 31, 2024 | $ | (122,132) |  |  | $ | 8,088 |  |  | $ | (2,674) |  |  | $ | (116,718) |
Net change | 45,830 |  |  | (1,855) |  |  | 4,723 |  |  | 48,698 |
Balance, September 30, 2025 | $ | (76,302) |  |  | $ | 6,233 |  |  | $ | 2,049 |  |  | $ | (68,020) |
Balance, December 31, 2023 | $ | (112,844) |  |  | $ | 10,580 |  |  | $ | 1,249 |  |  | $ | (101,015) |
Net change | 21,585 |  |  | (1,864) |  |  | 2,459 |  |  | 22,180 |
Balance, September 30, 2024 | $ | (91,259) |  |  | $ | 8,716 |  |  | $ | 3,708 |  |  | $ | (78,835) |
Schedule of Pre-tax and After-tax Changes in the Components of Other Comprehensive Income | The following table presents the pre-tax and after-tax changes in the components of other comprehensive income (loss):
| Three months ended September 30,
| 2025 |  | 2024
($ in thousands) | Pre-tax |  | Tax effect |  | After-tax |  | Pre-tax |  | Tax effect |  | After-tax
Change in unrealized gain on available-for-sale securities | $ | 28,826 |  |  | $ | 7,149 |  |  | $ | 21,677 |  |  | $ | 50,576 |  |  | $ | 12,543 |  |  | $ | 38,033 |
Reclassification of gain on held-to-maturity securities(a) | (846) |  |  | (210) |  |  | (636) |  |  | (823) |  |  | (204) |  |  | (619) |
Change in unrealized gain (loss) on cash flow hedges | (489) |  |  | (121) |  |  | (368) |  |  | 7,303 |  |  | 1,811 |  |  | 5,492 |
Reclassification of loss on cash flow hedges(b) | 388 |  |  | 96 |  |  | 292 |  |  | 529 |  |  | 131 |  |  | 398 |
Total other comprehensive gain | $ | 27,879 |  |  | $ | 6,914 |  |  | $ | 20,965 |  |  | $ | 57,585 |  |  | $ | 14,281 |  |  | $ | 43,304 |
| Nine months ended September 30,
| 2025 |  | 2024
($ in thousands) | Pre-tax |  | Tax effect |  | After-tax |  | Pre-tax |  | Tax effect |  | After-tax
Change in unrealized gain on available-for-sale securities | $ | 61,051 |  |  | $ | 15,141 |  |  | $ | 45,910 |  |  | $ | 28,703 |  |  | $ | 7,118 |  |  | $ | 21,585 |
Reclassification of gain on sale of available-for-sale securities(a) | (106) |  |  | (26) |  |  | (80) |  |  | — |  |  | — |  |  | — |
Reclassification of gain on held-to-maturity securities(a) | (2,467) |  |  | (612) |  |  | (1,855) |  |  | (2,479) |  |  | (615) |  |  | (1,864) |
Change in unrealized loss on cash flow hedges | 5,302 |  |  | 1,315 |  |  | 3,987 |  |  | 1,828 |  |  | 453 |  |  | 1,375 |
Reclassification of loss on cash flow hedges(b) | 978 |  |  | 242 |  |  | 736 |  |  | 1,441 |  |  | 357 |  |  | 1,084 |
Total other comprehensive gain | $ | 64,758 |  |  | $ | 16,060 |  |  | $ | 48,698 |  |  | $ | 29,493 |  |  | $ | 7,313 |  |  | $ | 22,180 |
(a)The pre-tax amount is reported in noninterest income/expense in the Consolidated Statements of Income.
(b)The pre-tax amount is reported in interest income/expense in the Consolidated Statements of Income.

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