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GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of other intangible asset disclosures (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Goodwill and other intangibles assets |  |
Intangible assets, gross | $ 132,203 | $ 132,203
Accumulated amortization | 85,780 | 74,152
Total estimated amortization expense | 46,423 | 58,051
Core deposit intangible |  |
Goodwill and other intangibles assets |  |
Intangible assets, gross | 99,065 | 99,065
Accumulated amortization | 63,476 | 55,161
Total estimated amortization expense | 35,589 | 43,904
Customer relationship intangible |  |
Goodwill and other intangibles assets |  |
Intangible assets, gross | 33,138 | 33,138
Accumulated amortization | 22,304 | 18,991
Total estimated amortization expense | $ 10,834 | $ 14,147

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