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Federal Income Taxes
 9 Months Ended
Sep. 30, 2019
Income Tax Disclosure [Abstract]  
Federal Income Taxes
Federal Income Taxes
The reconciliation of the provision for federal income taxes and the amount computed at the federal statutory tax rate of income before federal income tax expense is as follows for the:

Three Months Ended 
 September 30
 
Nine Months Ended 
 September 30
 
2019
 
2018
 
2019
 
2018
Income taxes at statutory rate
$
1,065

 
$
851

 
$
2,866

 
$
2,389

Effect of nontaxable income
 
 
 
 
 
 
 
Interest income on tax exempt municipal securities
(224
)
 
(259
)
 
(704
)
 
(797
)
Earnings on corporate owned life insurance policies
(39
)
 
(35
)
 
(118
)
 
(109
)
Effect of tax credits
(182
)
 
(200
)
 
(539
)
 
(601
)
Other
(4
)
 
(6
)
 
(12
)
 
(25
)
Total effect of nontaxable income
(449
)
 
(500
)
 
(1,373
)
 
(1,532
)
Effect of nondeductible expenses
14

 
8

 
27

 
30

Federal income tax expense
$
630

 
$
359

 
$
1,520

 
$
887