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DEPOSITS - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Deposit Liabilities Disclosures [Line Items]      
Interest expense on time deposits of $250,000 or more $ 2,100,000 $ 1,400,000 $ 7,400,000
Maximum brokered certificates of deposit balance allowed per company policy 1,100,000,000    
Related party deposit liabilities 11,000,000 10,600,000  
Demand deposit overdrafts reclassified as loans 1,200,000 1,100,000  
Certificates of deposit - CDs      
Deposit Liabilities Disclosures [Line Items]      
Brokered certificates of deposit $ 220,900,000 24,700,000  
Weighted average cost, domestic deposit, brokered 3.59%    
Brokered certificates of deposit, maturity period, less than 5 months    
Brokered non-maturity deposits      
Deposit Liabilities Disclosures [Line Items]      
Brokered certificates of deposit $ 438,400,000 $ 270,100,000  
Weighted average cost, domestic deposit, brokered 1.26%