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BORROWINGS (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Short-Term Debt [Line Items]    
FRB advances under BTFP $ 1,878,000 $ 1,016,000
Amount    
Within one year 878,000  
One to three years 450,000  
Three through five years 550,000  
Total $ 1,878,000  
Weighted Average Rate    
Within one year 4.84%  
One to three years 4.56%  
Three through five years 4.35%  
Total 4.63%  
Federal Reserve Bank Advances | Bank Term Funding Program    
Short-Term Debt [Line Items]    
FRB advances under BTFP $ 300,000