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FAIR VALUE OF FINANCIAL INSTRUMENTS (Qualitative Information for Assets and Liabilities) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Fair Value            
Investment securities available-for-sale $ 1,478,409     $ 510,713    
Servicing assets 50,061 $ 48,227 $ 49,280 48,973 $ 47,712 $ 47,295
Other repossessed assets $ 3,307     $ 1,945    
Minimum            
Unobservable Input            
Constant prepayment rate 3.38% 4.37%        
Maximum            
Unobservable Input            
Constant prepayment rate 20.36% 21.09%        
Level 3 | Cash flow valuation | Other debt securities available for sale            
Fair Value            
Investment securities available-for-sale $ 399          
Level 3 | Cash flow valuation | Other debt securities available for sale | Recovery Rate            
Unobservable Input            
Other debt securities, measurement input 0.3473          
Level 3 | Cash flow valuation | Servicing Assets            
Fair Value            
Servicing assets $ 50,061          
Level 3 | Cash flow valuation | Minimum | Other debt securities available for sale            
Unobservable Input            
Credit rating 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          
Level 3 | Cash flow valuation | Minimum | Servicing Assets            
Unobservable Input            
Constant prepayment rate 3.38%          
Discount rate 10.00%          
Level 3 | Cash flow valuation | Maximum | Other debt securities available for sale            
Unobservable Input            
Credit rating 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          
Level 3 | Cash flow valuation | Maximum | Servicing Assets            
Unobservable Input            
Constant prepayment rate 20.36%          
Discount rate 15.50%          
Level 3 | Cash flow valuation | Weighted Average | Other debt securities available for sale            
Unobservable Input            
Credit rating 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          
Level 3 | Cash flow valuation | Weighted Average | Other debt securities available for sale | Recovery Rate            
Unobservable Input            
Other debt securities, measurement input 0.3473          
Level 3 | Cash flow valuation | Weighted Average | Servicing Assets            
Unobservable Input            
Constant prepayment rate 5.69%          
Discount rate 11.45%          
Level 3 | Fair value of property or collateral | Collateralized loan obligations            
Fair Value            
Collateral dependent loans $ 19,977          
Level 3 | Fair value of property or collateral | Foreclosed real estate            
Fair Value            
Foreclosed real estate 14,561          
Level 3 | Fair value of property or collateral | Other repossessed assets            
Fair Value            
Other repossessed assets $ 3,307          
Level 3 | Fair value of property or collateral | Minimum | Collateralized loan obligations            
Unobservable Input            
Appraised value less disposition costs 10.20%          
Level 3 | Fair value of property or collateral | Minimum | Foreclosed real estate            
Unobservable Input            
Appraised value less disposition costs 10.20%          
Level 3 | Fair value of property or collateral | Minimum | Other repossessed assets            
Unobservable Input            
Estimated net realizable value less disposition costs 22.00%          
Level 3 | Fair value of property or collateral | Maximum | Collateralized loan obligations            
Unobservable Input            
Appraised value less disposition costs 33.20%          
Level 3 | Fair value of property or collateral | Maximum | Foreclosed real estate            
Unobservable Input            
Appraised value less disposition costs 33.20%          
Level 3 | Fair value of property or collateral | Maximum | Other repossessed assets            
Unobservable Input            
Estimated net realizable value less disposition costs 80.00%          
Level 3 | Fair value of property or collateral | Weighted Average | Collateralized loan obligations            
Unobservable Input            
Appraised value less disposition costs 17.16%          
Level 3 | Fair value of property or collateral | Weighted Average | Foreclosed real estate            
Unobservable Input            
Appraised value less disposition costs 11.71%          
Level 3 | Fair value of property or collateral | Weighted Average | Other repossessed assets            
Unobservable Input            
Estimated net realizable value less disposition costs 62.96%