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Federal Income Taxes (Tables)
9 Months Ended
Sep. 30, 2022
Income Tax Disclosure [Abstract]  
Summary of federal income tax expense The reconciliation of the provision for federal income taxes and the amount computed at the federal statutory tax rate of 21% of income before federal income tax expense is as follows for the:
Three Months Ended 
 September 30
Nine Months Ended 
 September 30
2022202120222021
Income taxes at statutory rate$1,496 $1,176 $4,025 $3,684 
Effect of nontaxable income
Interest income on tax exempt municipal securities(147)(143)(425)(474)
Earnings on corporate owned life insurance policies(47)(43)(150)(153)
Other(4)(9)(12)(22)
Total effect of nontaxable income(198)(195)(587)(649)
Effect of nondeductible expenses11 26 23 
Effect of tax credits(74)(76)(215)(220)
Federal income tax expense$1,233 $916 $3,249 $2,838