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Concentrations of Credit Risk (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Concentration Risk [Line Items] |  |
Credit extending terms to borrowers | The Bank, as a matter of policy, does not generally extend credit to any single borrower or group of related borrowers in excess of 25 percent of statutory capital, or approximately |
Percentage of statutory capital | 25.00% |
Credit extending terms, maximum amount of statutory capital | $ 77.8 |
Commercial Real Estate [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk (as a percent) | 55.00% | 56.00%
Loan Portfolio Secured by Real Estate [Member] |  |
Concentration Risk [Line Items] |  |
Concentration risk (as a percent) | 82.00% |

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- Definition The element represents the terms and conditions for extending credit borrowers. + References No definition available. + Details
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- Definition Statutory Capital, Maximum Limit To Extend Credit To Borrowers, Amount + References No definition available. + Details
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