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Taxes
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Taxes
Taxes
 
We are subject to U.S. federal income tax and various state, local, and international income taxes in numerous jurisdictions. Our domestic and international tax liabilities are subject to the allocation of revenue and expenses in different jurisdictions and the timing of recognizing revenue and expenses. As such, our effective tax rate is impacted by the geographical distribution of income and mix of profits in the various jurisdictions. Additionally, the amount of income taxes paid is subject to our interpretation of applicable tax laws in the jurisdictions in which we file.
  
We expect a taxable profit in the U.S. and U.K. for the full year 2015 before consideration of excess tax benefits, and therefore we anticipate utilizing benefits of tax deductions related to stock compensation in 2015. As a result, we have recognized an excess tax benefit in the U.S. and U.K. during the current period.