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FAIR VALUE OF FINANCIAL INSTRUMENTS (Qualitative Information for Assets and Liabilities) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Fair Value        
Investment securities available-for-sale $ 1,353,106   $ 1,412,776  
Servicing assets 49,345 $ 49,446 50,921 $ 48,973
Other repossessed assets $ 4,563   4,617  
Minimum        
Fair Value        
Discount rate 10.00% 10.00%    
Unobservable Input        
Constant prepayment rate 3.59% 3.88%    
Maximum        
Fair Value        
Discount rate 15.50% 15.50%    
Unobservable Input        
Constant prepayment rate 23.26% 24.30%    
Level 3 | Cash flow valuation | Other debt securities available for sale        
Fair Value        
Investment securities available-for-sale $ 413   $ 406  
Level 3 | Cash flow valuation | Other debt securities available for sale | Recovery Rate        
Unobservable Input        
Other debt securities, measurement input 0.3473   0.3473  
Level 3 | Cash flow valuation | Servicing Assets        
Fair Value        
Servicing assets $ 49,345   $ 50,921  
Level 3 | Cash flow valuation | Minimum | Other debt securities available for sale        
Unobservable Input        
Credit rating Baa1   Baa1  
Level 3 | Cash flow valuation | Minimum | Other debt securities available for sale | Probability of Default Rate        
Unobservable Input        
Other debt securities, measurement input 0.0015   0.0015  
Level 3 | Cash flow valuation | Minimum | Servicing Assets        
Fair Value        
Discount rate 10.00%   10.00%  
Unobservable Input        
Constant prepayment rate 3.59%   3.43%  
Level 3 | Cash flow valuation | Maximum | Other debt securities available for sale        
Unobservable Input        
Credit rating Baa3   Baa3  
Level 3 | Cash flow valuation | Maximum | Other debt securities available for sale | Probability of Default Rate        
Unobservable Input        
Other debt securities, measurement input 0.0212   0.0212  
Level 3 | Cash flow valuation | Maximum | Servicing Assets        
Fair Value        
Discount rate 15.50%   15.50%  
Unobservable Input        
Constant prepayment rate 23.26%   21.20%  
Level 3 | Cash flow valuation | Weighted Average | Other debt securities available for sale        
Unobservable Input        
Credit rating Baa2   Baa2  
Level 3 | Cash flow valuation | Weighted Average | Other debt securities available for sale | Probability of Default Rate        
Unobservable Input        
Other debt securities, measurement input 0.0015   0.0015  
Level 3 | Cash flow valuation | Weighted Average | Other debt securities available for sale | Recovery Rate        
Unobservable Input        
Other debt securities, measurement input 0.3473   0.3473  
Level 3 | Cash flow valuation | Weighted Average | Servicing Assets        
Fair Value        
Discount rate 11.45%   11.45%  
Unobservable Input        
Constant prepayment rate 6.06%   5.66%  
Level 3 | Fair value of property or collateral | Collateral dependent loans        
Fair Value        
Collateral dependent loans $ 9,117   $ 8,805  
Level 3 | Fair value of property or collateral | Foreclosed real estate        
Fair Value        
Other Real Estate, Foreclosed Assets, and Repossessed Assets 9,250   11,214  
Level 3 | Fair value of property or collateral | Other repossessed assets        
Fair Value        
Other repossessed assets 4,563   4,617  
Level 3 | Fair value of property or collateral | Mortgage loans held for sale        
Fair Value        
Mortgage loans held for sale $ 13,616   $ 19,499  
Level 3 | Fair value of property or collateral | Minimum | Collateral dependent loans        
Unobservable Input        
Appraised value less disposition costs 10.20%   10.20%  
Level 3 | Fair value of property or collateral | Minimum | Foreclosed real estate        
Unobservable Input        
Appraised value less disposition costs 10.20%   10.20%  
Level 3 | Fair value of property or collateral | Minimum | Other repossessed assets        
Unobservable Input        
Estimated net realizable value 25.00%   22.00%  
Level 3 | Fair value of property or collateral | Minimum | Mortgage loans held for sale        
Unobservable Input        
Estimated net realizable value 96.43%   83.25%  
Level 3 | Fair value of property or collateral | Maximum | Collateral dependent loans        
Unobservable Input        
Appraised value less disposition costs 33.20%   51.20%  
Level 3 | Fair value of property or collateral | Maximum | Foreclosed real estate        
Unobservable Input        
Appraised value less disposition costs 33.20%   33.20%  
Level 3 | Fair value of property or collateral | Maximum | Other repossessed assets        
Unobservable Input        
Estimated net realizable value 78.00%   80.00%  
Level 3 | Fair value of property or collateral | Maximum | Mortgage loans held for sale        
Unobservable Input        
Estimated net realizable value 102.57%   102.43%  
Level 3 | Fair value of property or collateral | Weighted Average | Collateral dependent loans        
Unobservable Input        
Appraised value less disposition costs 17.12%   17.11%  
Level 3 | Fair value of property or collateral | Weighted Average | Foreclosed real estate        
Unobservable Input        
Appraised value less disposition costs 12.15%   11.81%  
Level 3 | Fair value of property or collateral | Weighted Average | Other repossessed assets        
Unobservable Input        
Estimated net realizable value 61.37%   58.49%  
Level 3 | Fair value of property or collateral | Weighted Average | Mortgage loans held for sale        
Unobservable Input        
Estimated net realizable value 99.88%   71.86%  
Level 3 | Bids or sales contract prices | Commercial        
Fair Value        
Other loans held for sale $ 19,069   $ 21,088  
Level 3 | Bids or sales contract prices | Minimum | Commercial        
Unobservable Input        
Estimated market value 100.00%   100.00%  
Level 3 | Bids or sales contract prices | Maximum | Commercial        
Unobservable Input        
Estimated market value 133.64%   103.20%  
Level 3 | Bids or sales contract prices | Weighted Average | Commercial        
Unobservable Input        
Estimated market value 101.01%   74.65%