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INCOME TAXES
 9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
INCOME TAXES
INCOME TAXES

The Company's effective income tax rate for the three and nine months ended September 30, 2017 and 2016 was as follows:
 
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
 
2017
 
2016
 
2017
 
2016
Income tax expense
 
$
5,478

 
$
5,042

 
$
14,543

 
$
12,742

Income before income tax expense
 
$
16,817

 
$
15,945

 
$
46,192

 
$
41,907

Effective tax rate
 
32.6
 %
 
31.6
 %
 
31.5
 %
 
30.4
 %
Discrete period item(s) — impact on effective tax rate:
 
 
 
 
 
 
 
 
Windfall tax benefits, net(1)
 
(0.2
)%
 
(0.4
)%
 
(0.4
)%
 
(1.0
)%
BOLI death benefit income (non-taxable)
 
—
 %
 
—
 %
 
—
 %
 
(0.3
)%

(1)
Represents the net windfall tax benefits generated upon vesting of share-based awards issued and exercise of stock options that were accounted for within income tax expense on the consolidated statements of income as a discrete period item.

During the three months ended September 30, 2017, the IRS completed its examination of the Company's 2013 and 2014 federal income tax returns that resulted in no material changes to the Company's consolidated financial statements.