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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Reconciliation between the U.S. federal statutory tax rate and effective tax rate
A reconciliation between the U.S. federal statutory tax rate and our effective tax rate is summarized as follows:
 
For the Three Months
Ended March 31,
 
2014
 
2013
Statutory rate
35.0
 %
 
35.0
 %
State taxes
1.2

 
7.7

Taxes on foreign earnings
(8.4
)
 
(9.9
)
Credits and net operating loss utilization
(1.3
)
 
(3.3
)
Purchased intangible assets
1.5

 
1.1

Manufacturing deduction
(2.0
)
 
(22.7
)
Other permanent items
0.3

 
5.5

Other
0.5

 
(0.2
)
Effective tax rate
26.8
 %
 
13.2
 %