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BUSINESS COMBINATION - Narrative (Details) - USD ($)
$ in Thousands
Jan. 06, 2023
Sep. 30, 2023
Dec. 31, 2022
Business Acquisition [Line Items]      
Goodwill   $ 21,134 $ 0
NBNYC      
Business Acquisition [Line Items]      
Acquisition consideration $ 20,000    
Acquisition costs 1,300    
Contributions to subsidiary 31,000    
Transaction costs   $ 200  
Goodwill $ 1,224    
NBNYC | Core Deposits      
Business Acquisition [Line Items]      
Intangible asset, useful life 10 years