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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Non Traditional Mortgage Loans Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans $ 7,115,038 $ 7,251,480
Consumer:    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans $ 7,115,038  
Loans And Finance Receivables, Non-Traditional Mortgages | Loan Portfolio | Loan Portfolio Concentration Risk    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage to total loans and leases (percent) 12.10% 8.80%
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer:    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans $ 862,300 $ 635,300
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: | Nonperforming    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans $ 3,000 $ 4,000
Weighted average LTV (percent) 59.00%  
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: | Interest Only | Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Mortgage loan term (in years) 30 years  
Mortgage loan, flexible initial term (in years) 1 year  
Loans And Finance Receivables, Non-Traditional Mortgages | Consumer: | Interest Only | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Mortgage loan term (in years) 40 years  
Mortgage loan, flexible initial term (in years) 10 years