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Our effective income tax rate differs from the federal statutory rate due to the following: 

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Income before provision for income taxes for the years ended December 31, 2013, 2012 and 2011 is as follows: 

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Income before provision for income taxes for international entities reflects income based on statutory transfer pricing agreements. This amount does not correlate to consolidated international revenues, many of which occur from our U.S. entity. 

Deferred income taxes on the balance sheet result from temporary differences between the amount of assets and liabilities recognized for financial reporting and tax purposes. The principal components of our current and non-current deferred taxes are as follows: 

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