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Federal Income Taxes (Tables)
6 Months Ended
Jun. 30, 2021
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 
 June 30
Six Months Ended 
 June 30
2021202020212020
Income taxes at statutory rate$1,156 $997 $2,508 $1,683 
Effect of nontaxable income
Interest income on tax exempt municipal securities(159)(191)(331)(394)
Earnings on corporate owned life insurance policies(40)(113)(110)(261)
Other(7)(4)(13)(8)
Total effect of nontaxable income(206)(308)(454)(663)
Effect of nondeductible expenses12 
Effect of tax credits(72)(134)(144)(266)
Federal income tax expense$881 $558 $1,922 $761