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Concentration of Risk and Off-Balance Sheet Risk (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Commitments to extend credit	$ 654,977,000	$ 435,553,000
Balance of loans sold under the program	$ 290,000	$ 4,610,000
Concentration risk, benchmark description	10% or more of the Bank's total net loans outstanding
Benchmark - Loans Receivable, Net [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	56.60%	63.00%
Financial Standby Letters of Credit [Member]
Concentration Risk [Line Items]
Commitments to extend credit	$ 39,468,000	$ 26,574,000

X

- Definition

Loans sold to federal home loan banks.

+ References

No definition available.

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- Definition

Identifies or describes the benchmark that serves as the denominator in the calculation of the percentage of concentration risk.

+ References

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- Definition

Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

+ References

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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.

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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

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