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GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - Servicing Contracts [Member] - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Morgage Servicing Rights at Amortized Value [Line Items]      
Loans Serviced For Others $ 2,740,000   $ 2,770,000
Custodial Accounts 22,600   $ 11,200
Servicing Asset at Amortized Value, Balance [Roll Forward]      
Balance, net of valuation allowance, beginning of the period 16,166 $ 17,206  
Additions—amounts capitalized 136 1,953  
Additions—through purchase 39 62  
Amortization (1) [1] (847) (1,231)  
Servicing Asset at Fair Value, Other Changes in Fair Value (119) (18)  
Balance, net of valuation allowance, end of the period [2] 15,613 $ 18,008  
Valuation allowance, end of period $ 0    
[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] There was no valuation allowance on mortgage servicing rights as of both March 31, 2023 and 2022.(3)    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.