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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Schedule of AOCI | The following table summarizes the changes within each classification of AOCI, net of tax:
(dollars in thousands) | Unrealized Gains and Losses on Available-for-Sale Debt Securities |  | Unrecognized Gains and Losses on Held-to-Maturity Securities |  | Gains and Losses on Hedges |  |  |  | Total
Three Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (542,158) |  |  | $ | (76,336) |  |  | $ | 18,886 |  |  |  |  | $ | (599,608) |
Other comprehensive income (loss) before reclassifications | 70,964 |  |  | — |  |  | (1,184) |  |  |  |  | 69,780 |
Amounts reclassified from AOCI to income (1) | (5) |  |  | 3,014 |  |  | 2,428 |  |  |  |  | 5,437 |
Balance at end of period | $ | (471,199) |  |  | $ | (73,322) |  |  | $ | 20,130 |  |  |  |  | $ | (524,391) |
Three Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (699,318) |  |  | $ | (88,986) |  |  | $ | (3,104) |  |  |  |  | $ | (791,408) |
Other comprehensive income (loss) before reclassifications | 162,861 |  |  | — |  |  | 17,537 |  |  |  |  | 180,398 |
Amounts reclassified from AOCI to income (1) | 57 |  |  | 3,537 |  |  | 3,660 |  |  |  |  | 7,254 |
Balance at end of period | $ | (536,400) |  |  | $ | (85,449) |  |  | $ | 18,093 |  |  |  |  | $ | (603,756) |
Nine Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (668,063) |  |  | $ | (82,294) |  |  | $ | 4,314 |  |  |  |  | $ | (746,043) |
Other comprehensive income (loss) before reclassifications | 196,782 |  |  | — |  |  | 10,623 |  |  |  |  | 207,405 |
Amounts reclassified from AOCI to income (1) | 82 |  |  | 8,972 |  |  | 5,193 |  |  |  |  | 14,247 |
Balance at end of period | $ | (471,199) |  |  | $ | (73,322) |  |  | $ | 20,130 |  |  |  |  | $ | (524,391) |
Nine Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ | (652,518) |  |  | $ | (95,472) |  |  | $ | 9,181 |  |  |  |  | $ | (738,809) |
Other comprehensive income (loss) before reclassifications | 116,051 |  |  | — |  |  | (1,883) |  |  |  |  | 114,168 |
Amounts reclassified from AOCI to income (1) | 67 |  |  | 10,023 |  |  | 10,795 |  |  |  |  | 20,885 |
Balance at end of period | $ | (536,400) |  |  | $ | (85,449) |  |  | $ | 18,093 |  |  |  |  | $ | (603,756) |
(1)See table below for details about reclassifications to income.
Schedule of Reclassifications out of AOCI | The following table summarizes the amounts reclassified out of each component of AOCI for the three months ended September 30, 2025 and 2024:
| Three Months Ended September 30, |  |
(dollars in thousands) | 2025 |  | 2024 |  |
Details about AOCI Components | Amount Reclassified from AOCI |  | Affected Line Item in the Statement of Income
Unrealized gains and losses on available-for-sale securities | $ | 7 |  |  | $ | (76) |  |  | Debt securities gains (losses), net
| (2) |  |  | 19 |  |  | Income tax (expense) benefit
| $ | 5 |  |  | $ | (57) |  |  | Net income
Amortization of unrecognized losses on held-to-maturity securities transferred from available-for-sale | $ | (4,040) |  |  | $ | (4,740) |  |  | Interest income (expense)
| 1,026 |  |  | 1,203 |  |  | Income tax (expense) benefit
| $ | (3,014) |  |  | $ | (3,537) |  |  | Net income
Gains and losses on hedges Interest rate contracts | $ | (3,275) |  |  | $ | (4,936) |  |  | Interest income (expense)
| 847 |  |  | 1,276 |  |  | Income tax (expense) benefit
| $ | (2,428) |  |  | $ | (3,660) |  |  | Net income
Total reclassifications for the period | $ | (5,437) |  |  | $ | (7,254) |  |  | Net income
The following table summarizes the amounts reclassified out of each component of AOCI for the nine months ended September 30, 2025 and 2024:
| Nine Months Ended September 30, |  |
(dollars in thousands) | 2025 |  | 2024 |  |
Details about AOCI Components | Amount Reclassified from AOCI |  | Affected Line Item in the Statement of Income
Unrealized gains and losses on available-for-sale securities | $ | (110) |  |  | $ | (90) |  |  | Debt securities gains (losses), net
| 28 |  |  | 23 |  |  | Income tax (expense) benefit
| $ | (82) |  |  | $ | (67) |  |  | Net income
Amortization of unrecognized losses on held-to-maturity securities transferred from available-for-sale | $ | (12,024) |  |  | $ | (13,434) |  |  | Interest income (expense)
| 3,052 |  |  | 3,411 |  |  | Income tax (expense) benefit
| $ | (8,972) |  |  | $ | (10,023) |  |  | Net income
Gains and losses on hedges Interest rate contracts | $ | (7,004) |  |  | $ | (14,560) |  |  | Interest income (expense)
| 1,811 |  |  | 3,765 |  |  | Income tax (expense) benefit
| $ | (5,193) |  |  | $ | (10,795) |  |  | Net income
Total reclassifications for the period | $ | (14,247) |  |  | $ | (20,885) |  |  | Net income

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