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SUBORDINATED NOTES (Details) - Subordinated Debt - USD ($)
3 Months Ended 12 Months Ended
Feb. 07, 2022
Jun. 23, 2016
Mar. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]          
Interest rate, stated percentage       6.625%  
London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable rate       5.412%  
Subordinated Notes due July 2026          
Debt Instrument [Line Items]          
Face amount $ 48,000 $ 4,500,000      
Interest rate, stated percentage 3.50% 6.625%      
Debt issuance costs, gross   $ 79,000 $ 79,000    
Debt issuance costs, net $ 875,000   $ 846,000 $ 0 $ 7,000
Amortization period   60 months 60 months    
Subordinated Notes due July 2026 | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable rate 2.05% 5.412% 5.412%