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Regulatory Matters (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier 1 Capital for Capital Adequacy (To Average Assets), Ratio 4.00%  
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets), ratio 4.50%  
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets), Ratio 6.00% 4.00%
Total Capital for Capital Adequacy (To Risk Weighted Assets), Ratio 8.00%  
Capital Conservation Buffer Percentage 2.50%  
Common Equity Tier 1 Capital Ratio with Capital Conservation Buffer 7.00%  
Tier 1 Capital Ratio with Capital Conservation Buffer 8.50%  
Total Capital Ratio with Capital Conservation Buffer 10.50%  
Annual Phase in Percentage of Capital Conservation Buffer 0.625%  
Capital Conservation Buffer Phase in Beginning Year Month 2016-01  
Capital Conservation Buffer Phase in End Year Month 2019-01  
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval $ 5,259  
Corporation [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier 1 Capital (To Average Assets) 74,417 $ 70,431
Common Equity Tier 1 Capital (to Risk Weighted Assets) 74,417 70,431
Tier 1 Capital (To Risk Weighted Assets) 74,417 70,431
Total Capital (To Risk Weighted Assets) $ 99,466 $ 85,148
Tier 1 Capital (to Average Assets), Ratio 6.50% 6.80%
Common Equity Tier 1 Capital (to Risk Weighted Assets), ratio 8.40% 9.10%
Tier 1 Capital (To Risk Weighted Assets), Ratio 8.40% 9.10%
Total Capital (To Risk Weighted Assets), Ratio 11.30% 11.00%
Tier 1 Capital for Capital Adequacy (To Average Assets) [1] $ 45,857 $ 41,595
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets) [1] 50,661 39,641
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets) [1] 63,877 51,244
Total Capital for Capital Adequacy (To Risk Weighted Assets) [1] $ 81,498 $ 66,714
Tier 1 Capital for Capital Adequacy (To Average Assets), Ratio [1] 4.00% 4.00%
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets), ratio [1] 5.75% 5.125%
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets), Ratio [1] 7.25% 6.625%
Total Capital for Capital Adequacy (To Risk Weighted Assets), Ratio [1] 9.25% 8.625%
Bank [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier 1 Capital (To Average Assets) $ 88,294 $ 77,026
Common Equity Tier 1 Capital (to Risk Weighted Assets) 88,294 77,026
Tier 1 Capital (To Risk Weighted Assets) 88,294 77,026
Total Capital (To Risk Weighted Assets) $ 96,005 $ 84,329
Tier 1 Capital (to Average Assets), Ratio 7.70% 7.40%
Common Equity Tier 1 Capital (to Risk Weighted Assets), ratio 10.00% 10.00%
Tier 1 Capital (To Risk Weighted Assets), Ratio 10.00% 10.00%
Total Capital (To Risk Weighted Assets), Ratio 10.90% 10.90%
Tier 1 Capital for Capital Adequacy (To Average Assets) [1] $ 45,846 $ 41,568
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets) [1] 50,661 39,611
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets) [1] 63,877 51,205
Total Capital for Capital Adequacy (To Risk Weighted Assets) [1] $ 81,498 $ 66,663
Tier 1 Capital for Capital Adequacy (To Average Assets), Ratio [1] 4.00% 4.00%
Common Equity Tier 1 Capital for Capital Adequacy (to Risk Weighted Assets), ratio [1] 5.75% 5.125%
Tier 1 Capital for Capital Adequacy (To Risk Weighted Assets), Ratio [1] 7.25% 6.625%
Total Capital for Capital Adequacy (To Risk Weighted Assets), Ratio [1] 9.25% 8.625%
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Average Assets) $ 57,308 $ 51,960
Common Equity Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets) 57,269 50,239
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets) 70,485 61,832
Total Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets) $ 88,106 $ 77,291
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Average Assets), Ratio 5.00% 5.00%
Common Equity Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets), ratio 6.50% 6.50%
Tier 1 Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets), Ratio 8.00% 8.00%
Total Capital to be Well-Capitalized Under Prompt Corrective Action Provision (To Risk Weighted Assets), Ratio 10.00% 10.00%
[1] Minimum amounts and ratios as of December 31, 2017 include the second year phase in of the capital conservation buffer of 1.25 percent required by the Basel III framework. At December 31, 2016, the minimum amounts and ratios included the first year phase in of the capital conservation buffer of 0.625 percent required by the Basel III framework.