Fair Value of Assets and Liabilities (Narrative) (Details) - USD ($)	9 Months Ended	12 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Impaired loans, valuation allowances	$ 3,289,000	$ 7,420,000
Foreclosed Real Estate [Member]
Fair value of foreclosed real estate	0	797,000
Foreclosed real estate, write-downs		617,000
Nonrecurring [Member]
Impaired loans	2,553,000	11,297,000
Fair value of foreclosed real estate		797,000
Mortgage servicing rights	548,000	1,047,000
(Level 3) Significant Other Unobservable Inputs [Member]
Impaired loans	2,553,000	11,297,000
Impaired loans, valuation allowances	3,289,000	7,420,000
Impaired loans charge-offs	134,000	134,000
(Level 3) Significant Other Unobservable Inputs [Member] \| Nonrecurring [Member]
Impaired loans	2,553,000	11,297,000
Fair value of foreclosed real estate		797,000
Mortgage servicing rights	$ 548,000	$ 1,047,000

The fair value of foreclosed real estate with a valuation allowance or write-down as of the balance sheet date.

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- Definition

The fair value of impaired loans with a valuation allowance or charge-off as of the balance sheet date.

+ References

No definition available.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

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Amount of allowance for credit losses related to recorded investment.

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- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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