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Other Comprehensive Income/Loss | 9 Months Ended
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Sep. 30, 2024
Equity [Abstract] |
Other Comprehensive Income/Loss | Other Comprehensive Loss The gross amounts of each component of other comprehensive loss and the related tax effects are as follows:
| Pre-tax |  | Tax (Expense) Benefit |  | Net of Tax
Three Months Ended September 30, | 2024 | 2023 |  | 2024 | 2023 |  | 2024 | 2023
Investment securities available-for sale: |  |  |  |  |  |  |  |
Change in net unrealized gains (losses) during the period | $ | 158.5 |  | $ | (72.1) |  |  | $ | (39.4) |  | $ | 17.9 |  |  | $ | 119.1 |  | $ | (54.2) |
Net change in unamortized losses on available-for-sale investment securities transferred into held-to-maturity | (0.2) |  | (0.3) |  |  | — |  | 0.1 |  |  | (0.2) |  | (0.2) |
Cash flow hedge: |  |  |  |  |  |  |  |
Change in unrealized gains (losses) on derivatives | 12.4 |  | (13.1) |  |  | (3.0) |  | 3.2 |  |  | 9.4 |  | (9.9) |
Reclassification adjustment for derivatives net losses included in income | 3.1 |  | 2.1 |  |  | (0.8) |  | (0.5) |  |  | 2.3 |  | 1.6 |
Total other comprehensive income (loss) | $ | 173.8 |  | $ | (83.4) |  |  | $ | (43.2) |  | $ | 20.7 |  |  | $ | 130.6 |  | $ | (62.7) |
| Pre-tax |  | Tax (Expense) Benefit |  | Net of Tax
Nine Months Ended September 30, | 2024 | 2023 |  | 2024 | 2023 |  | 2024 | 2023
Investment securities available-for sale: |  |  |  |  |  |  |  |
Change in net unrealized gains (losses) during the period | $ | 134.6 |  | $ | (51.4) |  |  | $ | (33.5) |  | $ | 12.7 |  |  | $ | 101.1 |  | $ | (38.7) |
Reclassification adjustment for net losses included in income | — |  | 23.5 |  |  | — |  | (5.8) |  |  | — |  | 17.7 |
Reclassification adjustment for securities transferred from held-to-maturity to available-for-sale | — |  | (7.2) |  |  | — |  | 1.8 |  |  | — |  | (5.4) |
Net change in unamortized losses on available-for-sale investment securities transferred into held-to-maturity | (0.5) |  | (1.1) |  |  | — |  | 0.3 |  |  | (0.5) |  | (0.8) |
Cash flow hedge: |  |  |  |  |  |  |  |
Change in unrealized gains on derivatives | (10.1) |  | (27.2) |  |  | 2.8 |  | 6.7 |  |  | (7.3) |  | (20.5) |
Reclassification adjustment for derivatives net losses included in income | 11.2 |  | 4.1 |  |  | (2.9) |  | (1.0) |  |  | 8.3 |  | 3.1 |
Total other comprehensive income (loss) | $ | 135.2 |  | $ | (59.3) |  |  | $ | (33.6) |  | $ | 14.7 |  |  | $ | 101.6 |  | $ | (44.6) |
The components of accumulated other comprehensive loss, net of related tax effects, are as follows:
| September 30, 2024 |  | December 31, 2023
Net unrealized loss on investment securities available-for-sale | $ | (249.0) |  |  | $ | (350.1) |
Net unrealized loss on investment securities transferred to held-to-maturity | (5.9) |  |  | (5.6) |
Net unrealized loss on derivatives | — |  |  | (0.8) |
Net accumulated other comprehensive loss | $ | (254.9) |  |  | $ | (356.5) |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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