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SECURITIES - Narrative (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Investment [Line Items]      
Debt Securities, Held-to-maturity, Nonaccrual $ 0 $ 0  
Interest receivable 49,350,000 39,145,000  
Transferred Securities, Unrealized Loss, Before Tax 121,500,000 1,500,000  
Securities Transferred, Unrealized Loss, Net Of Tax 96,000,000 1,200,000  
Fair value of securities transferred from AFS to HTM 1,250,000,000 0  
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]      
Net gain (loss) on sale of securities available for sale (3,819,000) 3,862,000 $ 8,257,000
Gross realized gains on AFS securities 584,000 4,100,000 8,400,000
Gross realized loss on AFS securities 4,400,000 218,000 129,000
Equity investments 11,181,000 11,841,000  
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]      
Proceeds from sale of held-to-maturity securities 0 0 $ 0
Debt Securities, Available-for-sale, Allowance for Credit Loss 0 0  
Other-than-temporarily impaired equity investments 0    
FHLB Stock with other-than-temporary impairment 0    
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal) $ 0 0  
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions 687    
Asset Pledged as Collateral      
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]      
Debt Securities $ 1,820,000,000 1,610,000,000  
Financial Asset, Past Due      
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract]      
Securities HTM (estimated fair value of $138,879) 0 0  
Available-for-sale Securities [Member]      
Investment [Line Items]      
Interest receivable 16,900,000 25,600,000  
Held-to-maturity Securities [Member]      
Investment [Line Items]      
Interest receivable $ 13,600,000 $ 244,000