v3.26.1
LONG-TERM SUBORDINATED NOTES - Narrative (Details) - Subordinated Notes 6.60% - Long Term Subordinated Debt
May 15, 2017
Apr. 26, 2007
Aug. 17, 2026
May 14, 2017
Debt Instrument [Line Items]        
Debt instrument, stated interest rate (as a percent)       6.60%
Interest basis spread, reset quarterly 2.385%      
Right to defer interest on one or more occasions for up to number of consecutive years   10 years    
Percentage of principal amount required for redemption (as a percent)   100.00%    
Subsequent Events        
Debt Instrument [Line Items]        
Reset quarterly interest rate (as a percent)     6.30%