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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%

X

- Definition

The element represents the terms and conditions for extending credit borrowers.

+ References

No definition available.

+ Details

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X

- Definition

Statutory Capital, Maximum Limit To Extend Credit To Borrowers, Amount

+ References

No definition available.

+ Details

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X

- Definition

Statutory Capital, Maximum Limit To Extend Credit To Borrowers, Percent

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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- Details

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