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Income Taxes
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

Our effective tax rate was 33% for the three months ended March 31, 2015, compared to 30% for the three months ended March 31, 2014. The difference in the effective rates for each period, compared to the statutory rate of 35%, is primarily attributable to the mix of pretax income in each year among domestic and foreign jurisdictions which are taxed at different rates. The current year reflects a higher contribution from domestic source income, which is taxed at a higher rate.

As of March 31, 2015, our gross liability for unrecognized tax benefits was $5.6 million. If fully recognized, these tax benefits would decrease our income tax expense by $5.6 million ($3.6 million, net of federal tax). We do not anticipate the recognition of any tax benefits that were previously unrecognized within the next 12 months.