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GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Servicing Asset at Amortized Value, Balance [Roll Forward]          
Additions—through purchase     $ 2,000 $ 165,000  
Servicing Contracts [Member]          
Morgage Servicing Rights at Amortized Value [Line Items]          
Loans Serviced For Others $ 2,800,000,000   2,800,000,000   $ 2,840,000,000
Custodial Accounts 30,500,000   30,500,000   $ 12,200,000
Servicing Asset at Amortized Value, Balance [Roll Forward]          
Balance, net of valuation allowance, beginning of the period 13,265,000 $ 14,010,000 13,487,000 14,649,000  
Additions—amounts capitalized 550,000 391,000 1,793,000 1,175,000  
Additions—through purchase 0 56,000      
Amortization (1) (815,000) [1] (827,000) [1] (2,451,000) (2,430,000)  
Servicing Asset at Fair Value, Other Changes in Fair Value (84,000) 21,000 (253,000) (50,000)  
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions 0 (6,000) 0 (6,000)  
Balance, net of valuation allowance, end of the period $ 13,084,000 $ 13,603,000 $ 13,084,000 $ 13,603,000  
[1] Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income within mortgage banking operations and any unamortized balance is fully amortized if the loan repays in full.
(2)    Fair value adjustments relate to SBA servicing rights. These adjustments are estimated based on an independent dealer analysis by discounting estimated net future cash flows from servicing SBA loans.