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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2016
Income Tax Disclosure [Abstract]  
Summary of Effective Income Tax Rate
The effective income tax differed from the expected 35% rate as shown below:
 
Three Months Ended September 30,
 
2016
 
%
 
2015
 
%
Expected income taxes
$
70,511

 
35.0

 
$
69,653

 
35.0

Increase (reduction) in income taxes resulting from:
 
 
 
 
 
 
 
Low income housing investments
(4,245
)
 
(2.1
)
 
(4,792
)
 
(2.4
)
Share-based awards
(6,608
)
 
(3.3
)
 
—

 
—

Other
(107
)
 
—

 
290

 
0.1

Income tax expense from continuing operations
$
59,551

 
29.6

 
$
65,151

 
32.7

 
 
 
 
 
 
 
 
 
Nine Months Ended September 30,
 
2016

%

2015

%
Expected income taxes
$
208,689


35.0


$
206,573


35.0

Increase (reduction) in income taxes resulting from:







Low income housing investments
(13,902
)

(2.3
)

(14,239
)

(2.4
)
Share-based awards
(12,774
)
 
(2.1
)
 
—

 
—

Other
(538
)

(0.2
)

712


0.1

Income tax expense from continuing operations
$
181,475

 
30.4

 
$
193,046

 
32.7