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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2024
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:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(dollars in thousands) | 2024 |  | 2023 |  | 2024 |  | 2023
Balance at beginning of period | $ | 2,170,709 |  |  | $ | 1,998,716 |  |  | $ | 1,998,716 |  |  | $ | 1,998,716 |
Acquisitions and adjustments | 6,290 |  |  | — |  |  | 178,283 |  |  | — |
Balance at end of period | $ | 2,176,999 |  |  | $ | 1,998,716 |  |  | $ | 2,176,999 |  |  | $ | 1,998,716 |
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
September 30, 2024 |  |  |  |  |
Core deposit | $ | 189,636 |  |  | $ | (89,825) |  |  | $ | 99,811 |
Customer trust relationships | 52,621 |  |  | (24,347) |  |  | 28,274 |
Total other intangible assets | $ | 242,257 |  |  | $ | (114,172) |  |  | $ | 128,085 |
December 31, 2023 |  |  |  |  |
Core deposit | $ | 143,511 |  |  | $ | (72,940) |  |  | $ | 70,571 |
Customer trust relationships | 52,621 |  |  | (20,942) |  |  | 31,679 |
Total other intangible assets | $ | 196,132 |  |  | $ | (93,882) |  |  | $ | 102,250 |
Schedule of Estimated Amortization Expense for Future Years | Estimated amortization expense for future years is as follows:
(dollars in thousands) |
2024 remaining | $ | 7,238 |
2025 | 26,116 |
2026 | 22,474 |
2027 | 18,947 |
2028 | 15,598 |
Thereafter | 37,712 |
Total | $ | 128,085 |

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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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