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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Carrying Amount of Goodwill | The following table presents the changes in the carrying amount of goodwill:
| Years Ended December 31,
(dollars in thousands) | 2023 |  | 2022 |  | 2021
Balance at beginning of period | $ | 1,998,716 |  |  | $ | 1,036,994 |  |  | $ | 1,036,994 |
Acquisitions and adjustments | — |  |  | 961,722 |  |  | — |
Balance at end of period | $ | 1,998,716 |  |  | $ | 1,998,716 |  |  | $ | 1,036,994 |
Schedule of Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets | The gross carrying amounts and accumulated amortization of other intangible assets were as follows:
(dollars in thousands) | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Carrying Amount
December 31, 2023 |  |  |  |  |
Core deposit | $ | 143,511 |  |  | $ | (72,940) |  |  | $ | 70,571 |
Customer trust relationships | 52,621 |  |  | (20,942) |  |  | 31,679 |
Total intangible assets | $ | 196,132 |  |  | $ | (93,882) |  |  | $ | 102,250 |
December 31, 2022 |  |  |  |  |
Core deposit | $ | 170,642 |  |  | $ | (80,951) |  |  | $ | 89,691 |
Customer trust relationships | 56,243 |  |  | (19,529) |  |  | 36,714 |
Total intangible assets | $ | 226,885 |  |  | $ | (100,480) |  |  | $ | 126,405 |
Schedule of Estimated Amortization Expense for Future Years | Estimated amortization expense for future years is as follows:
(dollars in thousands) |
2024 | $ | 21,239 |
2025 | 18,358 |
2026 | 15,555 |
2027 | 12,867 |
2028 | 10,356 |
Thereafter | 23,875 |
Total | $ | 102,250 |

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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://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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