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Income Taxes
3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

The tax provision for interim periods is determined using the estimated annual effective consolidated tax rate, based on the current estimate of full-year earnings before taxes, adjusted for the impact of discrete quarterly items. The provision for income taxes was $2.2 million and $6.9 million for the three months ended March 31, 2017 and 2016, respectively, and the effective tax rate was 3.6% and 24.8%, respectively. The decrease in the effective tax rate for the three months ended March 31, 2017, as compared to the same period in 2016, reflects the impact of a tax benefit of $15.9 million associated with our adoption of the guidance issued by the FASB regarding share-based payment transactions. Please refer to Note 2, New Accounting Standards, for additional details.