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Goodwill and Core Deposit Intangibles (Tables) | 6 Months Ended
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Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangibles | Other intangible assets are comprised of core deposit intangibles (“CDI”) and other customer relationship intangibles (“OCRI”) and amounted to the following at June 30, 2023 and December 31, 2022:
June 30, 2023 | CDI | OCRI | Total
Gross other intangible assets, at January 1, 2023 | $ | 154.7 |  | $ | 22.8 |  | $ | 177.5 |
Accumulated amortization | (85.7) |  | (2.7) |  | (88.4) |
Net other intangible assets, at June 30, 2023 | $ | 69.0 |  | $ | 20.1 |  | $ | 89.1 |
December 31, 2022 |  |  |
Gross other intangible assets, at January 1, 2022 | $ | 106.0 |  | $ | — |  | $ | 106.0 |
Amounts established through acquisition | 50.1 |  | 22.8 |  | 72.9 |
Reductions due to sale of health savings accounts | (1.4) |  | — |  | (1.4) |
Accumulated amortization | (78.8) |  | (1.7) |  | (80.5) |
Net other intangible assets, at December 31, 2022 | $ | 75.9 |  | $ | 21.1 |  | $ | 97.0 |
Schedule of Future Amortization Expense | The following table provides the estimated aggregate future amortization expense of other intangible assets at June 30, 2023:
Years Ending December 31, | CDI | OCRI | Total
2023 remaining | $ | 6.8 |  | $ | 0.9 |  | $ | 7.7 |
2024 | 12.7 |  | 1.9 |  | 14.6 |
2025 | 11.8 |  | 1.9 |  | 13.7 |
2026 | 10.9 |  | 1.9 |  | 12.8 |
2027 | 8.2 |  | 1.9 |  | 10.1 |
Thereafter | 18.6 |  | 11.6 |  | 30.2 |
Total | $ | 69.0 |  | $ | 20.1 |  | $ | 89.1 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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