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Income Taxes
3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes. Our overall effective tax rate for the three months ended March 31, 2016 and 2015 was 26.3% and 30.7%, respectively, which resulted in a provision for income taxes of $1.6 million and $2.3 million, respectively. The decrease in the effective income tax rate for the first quarter of 2016, when compared to the first quarter of 2015, was due primarily to the reinstatement of the federal research and development credit and a higher mix of earnings from our foreign operations, which are generally taxed at lower rates than our U.S. operations.