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Federal Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Federal statutory tax rate	21.00%	21.00%	21.00%	21.00%
Income taxes at 34% statutory rate	$ 1,069	$ 1,065	$ 2,752	$ 2,866
Interest income on tax exempt municipal securities	(176)	(224)	(570)	(704)
Earnings on corporate owned life insurance policies	(40)	(39)	(301)	(118)
Other	(4)	(4)	(12)	(12)
Total effect of nontaxable income	(220)	(267)	(883)	(834)
Effect of nondeductible expenses	7	14	14	27
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	122	182	388	539
Federal income tax expense	$ 734	$ 630	$ 1,495	$ 1,520

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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