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GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | The following table sets forth the carrying value of goodwill and other intangible assets, net of accumulated amortization, at December 31:
| 2021 |  | 2020
| (Dollars in thousands)
Balances not subject to amortization |  |  |
Goodwill | $ | 985,072 |  |  | $ | 506,206 |
Balances subject to amortization |  |  |
Core deposit intangibles | 27,053 |  |  | 22,215 |
Other intangible assets | 5,719 |  |  | 892 |
Total other intangible assets | 32,772 |  |  | 23,107 |
Total goodwill and other intangible assets | $ | 1,017,844 |  |  | $ | 529,313 |
Schedule of Goodwill | The changes in the carrying value of goodwill for the periods indicated were as follows:
| 2021 |  | 2020
| (Dollars in thousands)
Balance at beginning of year | $ | 506,206 |  |  | $ | 506,206 |
Acquisitions | 478,866 |  |  | — |
Balance at end of year | $ | 985,072 |  |  | $ | 506,206 |
Schedule of Other Intangible Assets | The gross carrying amount and accumulated amortization of other intangible assets were as follows at the dates indicated:
| December 31
| 2021 |  | 2020
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
| (Dollars in thousands)
Core deposit intangibles | $ | 48,920 |  |  | $ | (21,867) |  |  | $ | 27,053 |  |  | $ | 38,620 |  |  | $ | (16,405) |  |  | $ | 22,215 |
Other intangible assets | 6,390 |  |  | (671) |  |  | 5,719 |  |  | 2,434 |  |  | (1,542) |  |  | 892 |
Total | $ | 55,310 |  |  | $ | (22,538) |  |  | $ | 32,772 |  |  | $ | 41,054 |  |  | $ | (17,947) |  |  | $ | 23,107 |
Schedule of Intangible Assets Estimated Annual Amortization Expense | The following table sets forth the estimated annual amortization expense of intangible assets for each of the next five years:
Year | Amount
| (Dollars in thousands)
2022 | $ | 7,662 |
2023 | $ | 6,884 |
2024 | $ | 5,911 |
2025 | $ | 4,720 |
2026 | $ | 2,824 |

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