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GOODWILL AND OTHER INTANGIBLE ASSETS - Components of Other Identifiable Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 8,679 $ 8,415
Accumulated Amortization 6,029 5,337
Core deposit intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 8,390 8,390
Accumulated Amortization 6,029 5,312
Other customer relationship intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 289 25
Accumulated Amortization $ 0 $ 25