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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Income (Loss) | The following table presents the changes in accumulated other comprehensive income (loss) by component for the three and nine months ended September 30, 2025 and 2024. Amounts in parentheses indicate reductions to AOCI:
|  |  |  |  | Three Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |  |  |
(amounts in thousands) |  |  |  |  | Unrealized Gains (Losses) on Available for Sale Securities (1) |  | Unrealized Gains (Losses) on Cash Flow Hedges (2) |  | Total |  |  |  |  |  |  |  |  |  |  |
Balance at July 1 |  |  |  |  | $ | (71,325) |  |  | $ | — |  |  | $ | (71,325) |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains (losses) arising during period, before tax |  |  |  |  | 22,929 |  |  | 2,286 |  |  | 25,215 |  |  |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  |  |  | (6,066) |  |  | (605) |  |  | (6,671) |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 16,863 |  |  | 1,681 |  |  | 18,544 |  |  |  |  |  |  |  |  |  |  |  |
Reclassification adjustments for (gains) losses included in net income, before tax |  |  |  |  | (186) |  |  | 1,412 |  |  | 1,226 |  |  |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  |  |  | 49 |  |  | (373) |  |  | (324) |  |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income |  |  |  |  | (137) |  |  | 1,039 |  |  | 902 |  |  |  |  |  |  |  |  |  |  |  |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  |  |  | 1,074 |  |  | — |  |  | 1,074 |  |  |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  |  |  | (284) |  |  | — |  |  | (284) |  |  |  |  |  |  |  |  |  |  |  |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  |  |  | 790 |  |  | — |  |  | 790 |  |  |  |  |  |  |  |  |  |  |  |
Net current-period other comprehensive income (loss) |  |  |  |  | 17,516 |  |  | 2,720 |  |  | 20,236 |  |  |  |  |  |  |  |  |  |  |  |
Balance at September 30 |  |  |  |  | $ | (53,809) |  |  | $ | 2,720 |  |  | $ | (51,089) |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  | Three Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |  |
(amounts in thousands) |  |  |  |  | Unrealized Gains (Losses) on Available for Sale Securities (1) |  | Unrealized Gains (Losses) on Cash Flow Hedges (2) |  | Total |  |  |  |  |  |  |  |  |  |
Balance at July 1 |  |  |  |  | $ | (131,358) |  |  | $ | — |  |  | $ | (131,358) |  |  |  |  |  |  |  |  |  |  |
Unrealized gains (losses) arising during period, before tax |  |  |  |  | 32,810 |  |  | — |  |  | 32,810 |  |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  |  |  | (8,432) |  |  | — |  |  | (8,432) |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 24,378 |  |  | — |  |  | 24,378 |  |  |  |  |  |  |  |  |  |  |
Reclassification adjustments for (gains) losses included in net income, before tax |  |  |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income |  |  |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  |  |  |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  |  |  | 1,209 |  |  | — |  |  | 1,209 |  |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  |  |  | (311) |  |  | — |  |  | (311) |  |  |  |  |  |  |  |  |  |  |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  |  |  | 898 |  |  | — |  |  | 898 |  |  |  |  |  |  |  |  |  |  |
Net current-period other comprehensive income (loss) |  |  |  |  | 25,276 |  |  | — |  |  | 25,276 |  |  |  |  |  |  |  |  |  |  |
Balance at September 30 |  |  |  |  | $ | (106,082) |  |  | $ | — |  |  | $ | (106,082) |  |  |  |  |  |  |  |  |  |  |
|  |  | Nine Months Ended September 30, 2025 |  |  |  |  |  |
(amounts in thousands) |  |  | Unrealized Gains (Losses) Available for Sale Securities (1) |  | Unrealized Gains (Losses) on Cash Flow Hedges (2) |  |  |  | Total |  |  |  |  |  |  |  |  |
Balance at January 1 |  |  | $ | (96,560) |  |  | $ | — |  |  |  |  | $ | (96,560) |  |  |  |  |  |  |  |  |  |
Unrealized gains (losses) arising during period, before tax |  |  | 1,669 |  |  | 2,286 |  |  |  |  | 3,955 |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  | (463) |  |  | (605) |  |  |  |  | (1,068) |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) before reclassifications |  |  | 1,206 |  |  | 1,681 |  |  |  |  | 2,887 |  |  |  |  |  |  |  |  |  |
Reclassification adjustments for (gains) losses included in net income, before tax |  |  | 52,930 |  |  | 1,412 |  |  |  |  | 54,342 |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  | (13,923) |  |  | (373) |  |  |  |  | (14,296) |  |  |  |  |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) to net income |  |  | 39,007 |  |  | 1,039 |  |  |  |  | 40,046 |  |  |  |  |  |  |  |  |  |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  | 3,449 |  |  | — |  |  |  |  | 3,449 |  |  |  |  |  |  |  |  |  |
Income tax effect |  |  | (911) |  |  | — |  |  |  |  | (911) |  |  |  |  |  |  |  |  |  |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  | 2,538 |  |  | — |  |  |  |  | 2,538 |  |  |  |  |  |  |  |  |  |
Net current-period other comprehensive income (loss) |  |  | 42,751 |  |  | 2,720 |  |  |  |  | 45,471 |  |  |  |  |  |  |  |  |  |
Balance at September 30 |  |  | $ | (53,809) |  |  | $ | 2,720 |  |  |  |  | $ | (51,089) |  |  |  |  |  |  |  |  |  |
|  |  | Nine Months Ended September 30, 2024
(amounts in thousands) |  |  | Unrealized Gains (Losses) on Available for Sale Securities (1) |  | Unrealized Gains (Losses) on Cash Flow Hedges (2) |  | Total
Balance at January 1 |  |  | $ | (136,569) |  |  | $ | — |  |  | $ | (136,569) |
Unrealized gains (losses) arising during period, before tax |  |  | 36,439 |  |  | — |  |  | 36,439 |
Income tax effect |  |  | (9,351) |  |  | — |  |  | (9,351) |
Other comprehensive income (loss) before reclassifications |  |  | 27,088 |  |  | — |  |  | 27,088 |
Reclassification adjustments for (gains) losses included in net income, before tax |  |  | 749 |  |  | — |  |  | 749 |
Income tax effect |  |  | (193) |  |  | — |  |  | (193) |
Amounts reclassified from accumulated other comprehensive income (loss) to net income |  |  | 556 |  |  | — |  |  | 556 |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  | 3,821 |  |  | — |  |  | 3,821 |
Income tax effect |  |  | (978) |  |  | — |  |  | (978) |
Amortization of unrealized loss on securities transferred from available for sale to held to maturity |  |  | 2,843 |  |  | — |  |  | 2,843 |
Net current-period other comprehensive income |  |  | 30,487 |  |  | — |  |  | 30,487 |
Balance at September 30 |  |  | $ | (106,082) |  |  | $ | — |  |  | $ | (106,082) |
(1) Reclassification amounts for AFS debt securities are reported as net gain (loss) on sale of investment securities or impairment loss on debt securities, and amortization of unrealized losses on debt securities transferred from available-for-sale to held-to-maturity is reported within interest income on the consolidated statements of income. (2) Reclassification amounts for cash flow hedges are reported as interest income for the applicable hedged items on the consolidated statements of income. The following table presents the effect of Customers’ derivative financial instruments on comprehensive income for the three and nine months ended September 30, 2025 and 2024:
| Amount of Gain (Loss) Recognized in OCI on Derivatives (1) |  | Location of Gain (Loss) Reclassified from Accumulated OCI into Income |  | Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
| Three Months Ended September 30, |  |  |  | Three Months Ended September 30,
(amounts in thousands) | 2025 |  | 2024 |  |  |  | 2025 |  | 2024
Derivatives in cash flow hedging relationships: |  |  |  |  |  |  |  |  |
Interest rate swaps | $ | 1,681 |  |  | $ | — |  |  | Interest income |  | $ | (1,412) |  |  | $ | — |
|  |  |  |  | Amount of Gain (Loss) Recognized in OCI on Derivatives (1) |  | Location of Gain (Loss) Reclassified from Accumulated OCI into Income |  |  |  |  |  | Amount of Gain (Loss) Reclassified from Accumulated OCI into Income
|  |  |  |  | Nine Months Ended September 30, |  |  |  |  |  |  |  | Nine Months Ended September 30,
(amounts in thousands) |  |  |  |  | 2025 |  | 2024 |  |  |  |  |  |  |  | 2025 |  | 2024
Derivatives in cash flow hedging relationships: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  |  |  |  | $ | 1,681 |  |  | $ | — |  |  | Interest income |  |  |  |  |  | $ | (1,412) |  |  | $ | — |
(1) Amounts presented are net of taxes. Refer to NOTE 5 – CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) for the total effect on other comprehensive income (loss) from derivatives designated as cash flow hedges for the periods presented.

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