The following table summarizes the changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods indicated: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | | Unrealized holding gains (losses) on AFS securities | | Unrealized holding gains (losses) on SERP | | Unrealized holding gains (losses) on junior subordinated debt | | Impairment loss on securities | | Total | | | (in millions) | | Balance, March 31, 2025 | | $ | (480.6) | | | $ | (0.4) | | | $ | 2.5 | | | $ | — | | | $ | (478.5) | | | Other comprehensive income (loss) before reclassifications | | 9.7 | | | 0.1 | | | (4.1) | | | — | | | 5.7 | | | Amounts reclassified from AOCI | | (8.8) | | | — | | | — | | | — | | | (8.8) | | | Net current-period other comprehensive income (loss) | | 0.9 | | | 0.1 | | | (4.1) | | | — | | | (3.1) | | | Balance, June 30, 2025 | | $ | (479.7) | | | $ | (0.3) | | | $ | (1.6) | | | $ | — | | | $ | (481.6) | | | | | | | | | | | | | | Balance, March 31, 2024 | | $ | (560.8) | | | $ | (0.3) | | | $ | 2.3 | | | $ | 1.2 | | | $ | (557.6) | | | Other comprehensive income (loss) before reclassifications | | 1.7 | | | — | | | (0.5) | | | — | | | 1.2 | | | Amounts reclassified from AOCI | | (1.8) | | | — | | | — | | | — | | | (1.8) | | | Net current-period other comprehensive loss | | (0.1) | | | — | | | (0.5) | | | — | | | (0.6) | | | Balance, June 30, 2024 | | $ | (560.9) | | | $ | (0.3) | | | $ | 1.8 | | | $ | 1.2 | | | $ | (558.2) | | | | | | | | | | | | | | | Six Months Ended June 30, | | | Unrealized holding gains (losses) on AFS securities | | Unrealized holding gains (losses) on SERP | | Unrealized holding gains (losses) on junior subordinated debt | | Impairment loss on securities | | Total | | | (in millions) | | Balance, December 31, 2024 | | $ | (534.7) | | | $ | (0.4) | | | $ | 1.4 | | | $ | — | | | $ | (533.7) | | | Other comprehensive income (loss) before reclassifications | | 65.4 | | | 0.1 | | | (3.0) | | | — | | | 62.5 | | | Amounts reclassified from AOCI | | (10.4) | | | — | | | — | | | — | | | (10.4) | | | Net current-period other comprehensive income (loss) | | 55.0 | | | 0.1 | | | (3.0) | | | — | | | 52.1 | | | Balance, June 30, 2025 | | $ | (479.7) | | | $ | (0.3) | | | $ | (1.6) | | | $ | — | | | $ | (481.6) | | | | | | | | | | | | | | Balance, December 31, 2023 | | $ | (516.6) | | | $ | (0.3) | | | $ | 2.8 | | | $ | 1.2 | | | $ | (512.9) | | | Other comprehensive loss before reclassifications | | (43.2) | | | — | | | (1.0) | | | — | | | (44.2) | | | Amounts reclassified from AOCI | | (1.1) | | | — | | | — | | | — | | | (1.1) | | | Net current-period other comprehensive loss | | (44.3) | | | — | | | (1.0) | | | — | | | (45.3) | | | Balance, June 30, 2024 | | $ | (560.9) | | | $ | (0.3) | | | $ | 1.8 | | | $ | 1.2 | | | $ | (558.2) | |
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