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Goodwill and Core Deposit Intangibles | 9 Months Ended
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Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Core Deposit Intangibles | 7. GOODWILL AND CORE DEPOSIT INTANGIBLES Changes in the carrying amount of the Company’s goodwill and core deposit intangibles for the nine months ended September 30, 2024 and the year ended December 31, 2023 were as follows:
|  | Goodwill |  |  | Core Deposit Intangibles |
|  | (Dollars in thousands) |
Balance as of December 31, 2022 |  | $ | 3,231,636 |  |  | $ | 51,348 |
Less: |  |  |  |  |  |
Amortization |  |  | — |  |  |  | (12,676 | )
Add: |  |  |  |  |  |
First Bancshares merger |  |  | 164,450 |  |  |  | 25,322 |
Balance as of December 31, 2023 |  |  | 3,396,086 |  |  |  | 63,994 |
Less: |  |  |  |  |  |
Amortization |  |  | — |  |  |  | (11,539 | )
Add: |  |  |  |  |  |
Measurement period adjustment of First Bancshares merger |  |  | 316 |  |  |  | — |
Lone Star State Bancshares merger |  |  | 107,986 |  |  |  | 17,723 |
Balance as of September 30, 2024 |  | $ | 3,504,388 |  |  | $ | 70,178 |
Goodwill is recorded as of the acquisition date of each entity. The Company may record subsequent adjustments to goodwill for amounts undeterminable at acquisition date, such as deferred taxes and real estate valuations, and therefore the goodwill amounts may change accordingly. The Company initially records the total premium paid on acquisitions as goodwill. After finalizing the valuation, core deposit intangibles are identified and reclassified from goodwill to core deposit intangibles on the balance sheet. This reclassification has no effect on total assets, liabilities, shareholders’ equity, net income or cash flows. Management performs an evaluation annually, and more frequently if a triggering event occurs, of whether any impairment of the goodwill or core deposit intangibles has occurred. If any such impairment is determined, a write-down is recorded. As of September 30, 2024, there was no impairment recorded on goodwill and core deposit intangibles. The measurement period for the Company to determine the fair value of acquired identifiable assets and assumed liabilities will be at the end of the earlier of (1) twelve months from the date of acquisition or (2) as soon as the Company receives the information it was seeking about facts and circumstances that existed as of the date of acquisition. Core deposit intangibles are being amortized on a non-pro rata basis over their estimated lives, which the Company believes is between 10 and 15 years. Amortization expense related to intangible assets totaled $4.1 million and $3.6 million for the three months ended September 30, 2024 and 2023, respectively, and $11.5 million and $9.1 million for the nine months ended September 30, 2024 and 2023, respectively. The estimated aggregate future amortization expense for core deposit intangibles remaining as of September 30, 2024 is as follows (dollars in thousands):
Remaining 2024 |  | $ | 4,131 |
2025 |  |  | 14,441 |
2026 |  |  | 12,763 |
2027 |  |  | 11,262 |
2028 |  |  | 9,958 |
Thereafter |  |  | 17,623 |
Total |  | $ | 70,178 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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