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Income Taxes
6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Income Taxes
INCOME TAXES

A reconciliation of the U.S. federal statutory rate to our effective tax rate is as follows:
 
For the Three Months Ended 
 June 30,
 
For the Six Months Ended 
 June 30,
 
2015
 
2014
 
2015
 
2014
U.S. federal statutory rate
35.0
%
 
35.0
%
 
35.0
%
 
35.0
%
    State income taxes
1.7
%
 
1.2
%
 
1.7
%
 
1.8
%
    Other
0.1
%
 
0.2
%
 
0.1
%
 
0.2
%
Effective tax rate
36.8
%
 
36.4
%
 
36.8
%
 
37.0
%


The differences between the U.S. federal statutory rate and our effective tax rate are primarily due to state income taxes.