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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Effective Income Tax Rate Reconciliation
The primary differences between the U.S. statutory rate and our effective rate are as follows: 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2015
 
2014
 
2015
 
2014
 
 
 
 
 
 
 
 
U.S. statutory rate
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
Foreign provision
(54.6
)
 
(8.4
)
 
(31.5
)
 
(8.3
)
Tax benefits previously unrecognized
—

 
(4.5
)
 
—

 
(2.3
)
Other
(10.8
)
 
1.2

 
2.2

 
0.9

Effective rate
(30.4
)%
 
23.3
 %
 
5.7
 %
 
25.3
 %