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Benefits Plans - Narrative (Details)
3 Months Ended 6 Months Ended
Jul. 12, 2021
USD ($)
installment
$ / shares
shares
Jun. 30, 2022
USD ($)
installment
$ / shares
shares
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
installment
$ / shares
shares
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Benefits Plans            
Balance remaining on the ESOP loan   $ 1,018,682,000   $ 1,018,682,000   $ 968,093,000
401 (K) Plan            
Benefits Plans            
Participants maximum contribution (as a percent)       60.00%    
Employers matching contribution (as a percent)   0.00% 0.00% 0.00% 0.00%  
401 (K) Plan | Minimum            
Benefits Plans            
Participants maximum contribution (as a percent)       1.00%    
401 (K) Plan | Maximum            
Benefits Plans            
Participants maximum contribution (as a percent)       15.00%    
ESOP 2006 | Employee Stock Ownership Plan Loan            
Benefits Plans            
Expense on defined benefit plan.   $ 246,000 $ 106,000 $ 504,000 $ 203,000  
Amount borrowed from company $ 7,827,260 $ 5,184,200   $ 5,184,200    
Common stock shares acquired | shares 782,726     518,420    
Share price | $ / shares $ 10.00 $ 10.00   $ 10.00    
Interest rate on loans (as a percent) 3.25%     8.25%    
Number of installments of loans receivable | installment 15 20   20    
Balance remaining on the ESOP loan   $ 1,703,000   $ 1,703,000   1,703,000
Shares committed to be released | shares   2,894   2,894    
Dividends on unallocated shares reduced from loan   $ 209,000 4,000 $ 261,000 9,000  
Dividends on unallocated shares charged to retained earnings   146,000 11,000 182,000 23,000  
ESOP 2021 | Employee Stock Ownership Plan Loan            
Benefits Plans            
Balance remaining on the ESOP loan   $ 7,270,000   $ 7,270,000   $ 7,270,000
Shares committed to be released | shares   4,348   4,348    
Pension Plan | SERP            
Benefits Plans            
Term of average base salary preceding retirement       3 years    
Monthly installments       50.00%    
Expense on defined benefit plan.   $ 121,000 $ 132,000 $ 240,000 $ 227,000  
2023   0   0    
2024   0   0    
2025   0   0    
2026   0   0    
2027   $ 0   $ 0    
Pension Plan | SERP | Minimum            
Benefits Plans            
Benefit payment term       15 years