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NON-CONSOLIDATED VARIABLE INTEREST ENTITIES (VIEs) AND SERVICING ASSETS - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Servicing Liabilities At Fair Value [Line Items]        
Servicing Asset at Amortized Cost $ 24,624,000 $ 25,019,000 $ 26,355,000 $ 26,941,000
Servicing Asset At Fair Value Amount $ 42,613,000 $ 43,046,000    
Weighted-average yield 1.46% 1.45%    
Percentage Of Variation In Assumptions 10.00%      
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Qualitative Information These sensitivities are hypothetical and should be used with caution. As the figures indicate, changes in fair value based on a 10% variation in assumptions generally cannot be extrapolated because the relationship between the change in assumption and the change in fair value may not be linear. Also, in this table, the effect of a variation in a particular assumption on the fair value of the MSR is calculated without changing any other assumption. In reality, changes in one factor may result in changes in another (for example, increases in market interest rates may result in lower prepayments), which may magnify or counteract the sensitivities      
Debt Securities, Available-for-sale, Allowance for Credit Loss $ 516,000 $ 521,000 442,000 511,000
Junior subordinated debentures (amortized cost) 11,143,000 61,700,000    
Valuation allowance for servicing assets 44,000 44,000 0 0
Parent Company [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Junior subordinated debentures (amortized cost) $ 11,143,000 $ 61,700,000    
Minimum [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Percentage Of Variation In Assumptions 10.00%      
Maximum [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Percentage Of Variation In Assumptions 20.00%      
Junior Subordinated Debt [Member] | Parent Company [Member] | Trust Preferred Securities [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Trust preferred securities redemption call price percent 100.00%      
Repurchased face amount $ 50,600,000      
Junior Subordinated Debt [Member] | Statutory Trust One [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Spread on variable rate 2.75% 2.75%    
Junior Subordinated Debt [Member] | Statutory Trust One [Member] | Parent Company [Member] | Trust Preferred Securities [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Trust preferred securities repurchased $ 31,000,000.0      
Interest in Trust Preferred Securities 1,000,000.0      
Repurchased face amount 32,000,000.0      
Junior Subordinated Debt [Member] | Statutory Trust Two [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Spread on variable rate   2.50%    
Junior Subordinated Debt [Member] | Statutory Trust Two [Member] | Parent Company [Member] | Trust Preferred Securities [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Trust preferred securities repurchased 18,000,000.0      
Interest in Trust Preferred Securities 600,000      
Repurchased face amount $ 18,600,000      
Variable Rate Demand Obligation [Member] | Statutory Trust One [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Proceeds from Issuance of Trust Preferred Securities   $ 100,000,000    
Proceeds of the issuance, together with proceeds of the purchase   3,100,000    
Principal amount of corporation's junior subordinated deferrable debentures   103,100,000    
Variable Rate Demand Obligation [Member] | Statutory Trust Two [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Proceeds from Issuance of Trust Preferred Securities   125,000,000    
Proceeds of the issuance, together with proceeds of the purchase   3,900,000    
Principal amount of corporation's junior subordinated deferrable debentures   $ 128,900,000    
Residential MBS [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Weighted-average yield 1.79% 1.79%    
Debt Securities, Available-for-sale, Allowance for Credit Loss $ 176,000 $ 176,000    
Residential MBS [Member] | Private label [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Servicing Asset at Amortized Cost 5,900,000 6,100,000    
Servicing Asset At Fair Value Amount 4,000,000.0 $ 4,200,000    
Weighted-average yield   6.62%    
Debt Securities, Available-for-sale, Allowance for Credit Loss $ 176,000 $ 176,000 $ 116,000 $ 116,000
Residential MBS [Member] | Private label [Member] | Secured Overnight Financing Rate Sofr Overnight Index Swap Rate [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Spread on variable rate 0.26161%      
Debt Instrument Description Of Variable Rate Basis 3-month CME Term SOFR      
GNMA [Member]        
Servicing Liabilities At Fair Value [Line Items]        
Principal amount of corporation serviced loans securitized through GNMA $ 2,100,000,000