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Income Tax (Tables)
 6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
Summary of differences between income taxes at federal statutory tax rate and effective tax rate
The following table summarizes the major components creating differences between income taxes at the federal statutory and the effective tax rate recorded in the consolidated statements of income for the three and six months ended June 30, 2019 and 2018:

Three Months Ended
June 30,

Six Months Ended
June 30,
 
2019

2018

2019

2018
Reconciliation of Federal Statutory to Actual Tax Expense:
 

 

 

 
Federal statutory income tax at 21%
$
10,249


$
9,995


$
19,858


$
19,086

Tax-exempt interest income
(2,403
)

(2,045
)

(4,670
)

(4,060
)
Share-based compensation
(41
)

(91
)

(391
)

(532
)
Tax-exempt earnings and gains on life insurance
(199
)

(211
)

(406
)

(458
)
Tax credits
(63
)

(62
)

(141
)

(23
)
Other
206


375


440


559

Actual Tax Expense
$
7,749


$
7,961


$
14,690


$
14,572













Effective Tax Rate
15.9
%

16.7
%

15.5
%

16.0
%