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Regulatory Capital Requirements - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Regulatory Capital Requirements [Line Items] |  |  |
Leverage - For capital adequacy purposes Ratio |  | 4.00% |
Common Equity Tier 1 Capital - For capital adequacy purposes Ratio |  | 4.50% |
Tier 1 Capital - For capital adequacy purposes Ratio |  | 6.00% |
Total Risk Based Capital - For capital adequacy purposes Ratio |  | 8.00% |
Banks Regulatory Capital Requirements [Member] |  |  |
Regulatory Capital Requirements [Line Items] |  |  |
Leverage - Actual Amount |  | $ 92,978 | $ 86,808
Common Equity Tier 1 Capital - Actual Amount |  | 92,978 | 86,808
Tier 1 Capital - Actual Amount |  | 92,978 | 86,808
Total Risk Based Capital - Actual Amount |  | $ 98,953 | $ 92,407
Leverage - Actual Ratio |  | 9.93% | 9.62%
Common Equity Tier 1 Capital - Actual Ratio |  | 16.30% | 16.35%
Tier 1 Capital - Actual Ratio |  | 16.30% | 16.35%
Total Risk Based Capital - Actual Ratio |  | 17.35% | 17.40%
Leverage - For capital adequacy purposes Amount |  | $ 37,451 | $ 36,097
Common Equity Tier 1 Capital - For capital adequacy purposes Amount |  | 36,355 | 30,529
Tier 1 Capital - For capital adequacy purposes Amount |  | 44,909 | 38,493
Total Risk Based Capital - For capital adequacy purposes Amount |  | $ 56,314 | $ 49,112
Leverage - For capital adequacy purposes Ratio | [1] | 4.00% | 4.00%
Common Equity Tier 1 Capital - For capital adequacy purposes Ratio | [1] | 6.40% | 5.80%
Tier 1 Capital - For capital adequacy purposes Ratio | [1] | 7.90% | 7.30%
Total Risk Based Capital - For capital adequacy purposes Ratio | [1] | 9.90% | 9.30%
Leverage - To be well-capitalized under prompt corrective action provisions Amount |  | $ 46,814 | $ 44,105
Common Equity Tier 1 Capital - To be well-capitalized under prompt corrective action provisions Amount |  | 37,068 | 33,222
Tier 1 Capital - To be well-capitalized under prompt corrective action provisions Amount |  | 45,622 | 40,888
Total Risk Based Capital - To be well-capitalized under prompt corrective action provisions Amount |  | $ 57,027 | $ 51,110
Leverage - To be well-capitalized under prompt corrective action provisions Ratio |  | 5.00% | 5.00%
Common Equity Tier 1 Capital - To be well-capitalized under prompt corrective action provisions Ratio |  | 6.50% | 6.50%
Tier 1 Capital - To be well-capitalized under prompt corrective action provisions Ratio |  | 8.00% | 8.00%
Total Risk Based Capital - To be well-capitalized under prompt corrective action provisions Ratio |  | 10.00% | 10.00%
[1] | The required ratios for capital adequacy purposes include a capital conservation buffer of 1.875% for June 30, 2018 and 1.25% for December 31, 2017.

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- Definition The minimum common equity Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References No definition available. + Details
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