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SECURITIES AVAILABLE FOR SALE, HELD TO MATURITY, AND EQUITY SECURITIES - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
security
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
security
Sep. 30, 2023
USD ($)
Investment Holdings [Line Items]        
Purchases of securities available for sale | $ $ 46,400,000 $ 7,800,000 $ 54,206,000 $ 44,586,000
Proceeds from sale of available-for-sale securities | $   0 361,871,000 0
Debt securities, available-for-sale, realized gain | $ 0   5,100,000  
Debt securities, available-for-sale, realized loss | $ 0   54,900,000  
(Loss) on sale of AFS securities, net | $ $ 0 $ 0 $ (49,909,000) $ 0
Municipal bonds and obligations        
Investment Holdings [Line Items]        
Available-for-sale, securities in unrealized loss positions 40   40  
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage     3.60%  
Number of securities 91   91  
Held-to-maturity, securities in unrealized loss positions 111   111  
Number of securities in the portfolio of HTM 161   161  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions     10.20%  
Agency collateralized mortgage obligations        
Investment Holdings [Line Items]        
Available-for-sale, securities in unrealized loss positions 37   37  
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage     21.10%  
Number of securities 40   40  
Held-to-maturity, securities in unrealized loss positions 12   12  
Number of securities in the portfolio of HTM 12   12  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions     14.90%  
Agency commercial mortgage-backed securities        
Investment Holdings [Line Items]        
Available-for-sale, securities in unrealized loss positions 28   28  
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage     16.40%  
Number of securities 28   28  
Held-to-maturity, securities in unrealized loss positions 17   17  
Number of securities in the portfolio of HTM 17   17  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions     17.00%  
Corporate bonds        
Investment Holdings [Line Items]        
Available-for-sale, securities in unrealized loss positions 13   13  
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage     9.00%  
Number of securities 14   14  
Other bonds and obligations        
Investment Holdings [Line Items]        
Available-for-sale, securities in unrealized loss positions 2   2  
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage     18.30%  
Number of securities 3   3  
Tax advantaged economic development bonds        
Investment Holdings [Line Items]        
Held-to-maturity, securities in unrealized loss positions 2   2  
Number of securities in the portfolio of HTM 2   2  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions     2.90%