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Regulatory & Capital Matters (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2022
USD ($)
Dec. 31, 2021
Regulatory & Capital Matters    
Tier 1 capital leverage ratio (as a percent) 7.00 7.81
Risk-based capital ratio (as a percent) 12.85 12.55
Deferment of impact on retained earnings $ 2.9  
Subsidiaries [Member]    
Regulatory & Capital Matters    
Tier 1 capital leverage ratio (as a percent) 8.61 9.58
Risk-based capital ratio (as a percent) 13.83 13.46
Tier One leverage ratio, basis point decrease (as a percent) 0.97%  
Risk-based capital ratio, basis point increase (as a percent) 0.37%  
Minimum | Subsidiaries [Member]    
Regulatory & Capital Matters    
Tier 1 capital leverage ratio (as a percent) 8  
Risk-based capital ratio (as a percent) 12  
Tier 1 capital leverage ratio, board-designated threshold 8.00%  
Total Capital Ratio, board-designated threshold (as a percent) 12.00%