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Regulatory Capital Requirements (Details)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Retained earnings from prior two years available for dividends $ 28,008,000 $ 28,008,000
Capital conservation buffer 6.82%  
Capital conservation buffer, minimum 2.50%  
Tier 1 capital to risk-weighted assets [Abstract]    
Actual $ 192,760,000 178,773,000
Actual 192,760,000 178,773,000
For capital adequacy purposes   $ 56,113,000
Risk-weighted assets [Abstract]    
Actual (in hundredths)   14.34%
For capital adequacy purposes (in hundredths)   4.50%
Non Consolidated    
Tier 2 capital to risk-weighted asets [Abstract]    
Actual 207,461,000 $ 189,421,000
For capital adequacy purposes 112,899,000 99,756,000
To be well-capitalized under prompt corrective action provisions 141,124,000 124,695,000
Tier 1 capital to risk-weighted assets [Abstract]    
Actual 191,108,000 177,682,000
For capital adequacy purposes 84,675,000 74,817,000
To be well-capitalized under prompt corrective action provisions 112,899,000 99,756,000
Actual 191,108,000 177,682,000
For capital adequacy purposes 63,506,000 56,113,000
To be well-capitalized under prompt corrective action provisions $ 91,731,000 $ 81,052,000
Risk-weighted assets [Abstract]    
Actual (in hundredths) 0.1470 0.1519
For capital adequacy purposes (in hundredths) 0.0800 0.0800
To be well-capitalized under prompt corrective action provisions (in hundredths) 0.1000 0.1000
Actual (in hundredths) 0.1354 0.1425
For capital adequacy purposes (in hundredths) 0.0600 0.0600
To be well-capitalized under prompt corrective action provisions (in hundredths) 0.0800 0.0800
Actual (in hundredths) 13.54% 14.25%
For capital adequacy purposes (in hundredths) 4.50% 4.50%
To be well-capitalized under prompt corrective action provisions (in hundredths) 6.50% 6.50%
Tier 1 capital to average assets [Abstract]    
Actual $ 191,108,000 $ 177,682,000
For capital adequacy purpose 90,577,000 80,385,000
To be well-capitalized under prompt corrective action provisions $ 113,221,000 $ 100,481,000
Average assets [Abstract]    
Actual (in hundredths) 0.0844 0.0884
For capital adequacy purpose (in hundredths) 0.0400 0.0400
To be well-capitalized under prompt corrective action provisions (in hundredths) 0.0500 0.0500
Consolidated    
Tier 2 capital to risk-weighted asets [Abstract]    
Actual $ 209,113,000 $ 190,412,000
For capital adequacy purposes 112,899,000 99,756,000
Tier 1 capital to risk-weighted assets [Abstract]    
For capital adequacy purposes 84,675,000 $ 74,817,000
For capital adequacy purposes $ 63,506,000  
Risk-weighted assets [Abstract]    
Actual (in hundredths) 0.1482 0.1527
For capital adequacy purposes (in hundredths) 0.0800 0.0800
Actual (in hundredths) 0.1366 0.1434
For capital adequacy purposes (in hundredths) 0.0600 0.0600
Actual (in hundredths) 13.66%  
For capital adequacy purposes (in hundredths) 4.50%  
Tier 1 capital to average assets [Abstract]    
Actual $ 192,760,000 $ 178,773,000
For capital adequacy purpose $ 90,821,000 $ 80,527,000
Average assets [Abstract]    
Actual (in hundredths) 0.0849 0.0888
For capital adequacy purpose (in hundredths) 0.0400 0.0400