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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Income Tax Expense
Income tax expense was as follows:
 
Three Months Ended 
 March 31,
 
2015
 
2014
Current income tax expense
$
15,830

 
$
14,029

Deferred income tax expense (benefit)
(3,748
)
 
(1,933
)
Income tax expense, as reported
$
12,082

 
$
12,096

 
 
 
 
Effective tax rate
14.3
%
 
16.5
%