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SHORT-TERM BORROWINGS (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Short-term Debt [Line Items]    
Short-term borrowings $ 376,117,000 $ 131,597,000
Pledged commercial loans 11,318,869,000 9,844,484,000
Retail Repurchase Agreements    
Short-term Debt [Line Items]    
Short-term borrowings $ 95,303,000 $ 122,996,000
Debt term 12 months 12 months
Advances from the federal discount window    
Short-term Debt [Line Items]    
Borrowing capacity $ 725,600,000  
Short-term borrowings 224,000,000 $ 0
Remaining borrowing capacity 501,600,000  
Advances from the federal discount window | Asset Pledged as Collateral without Right    
Short-term Debt [Line Items]    
Pledged securities 1,490,000,000  
Pledged commercial loans 60,800,000  
Revolving Credit Facility    
Short-term Debt [Line Items]    
Borrowing capacity 100,000,000  
Short-term borrowings $ 0 $ 0