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LONG-TERM SUBORDINATED NOTES - Schedule of Outstanding Fixed to Floating Rate Long Term Subordinated Notes (Details) - USD ($)
Jun. 30, 2023
Dec. 31, 2022
Debt Instrument [Line Items]    
Consolidated Balance Sheet Amount $ 218,000,000 $ 218,000,000
Subordinated Debt | 6.6 % Long Term Subordinated Notes    
Debt Instrument [Line Items]    
Original Principal Amount 400,000,000  
Consolidated Balance Sheet Amount 218,000,000 218,000,000
Fair Value $ 187,000,000 $ 187,000,000