Income Taxes	9 Months Ended
Sep. 30, 2017
Income Taxes
Income Taxes	7. Income Taxes Our effective income tax rates for the three months ended September 30, 2017 and 2016 were 30.4% and 28.2%, respectively. Our effective income tax rates for the nine months ended September 30, 2017 and 2016 were 31.5% and 25.7%, respectively. Our 2016 nine-month period effective income tax rate was favorably impacted by the resolution of a tax position that was previously uncertain, which lowered our 2016 nine-month income tax provision by $17.6 million and our effective income tax rate by 5.3 percentage points. Other permanent items that lowered our effective income tax rates from the federal statutory rate were not materially different during both years and relate mainly to company-owned life insurance policies, domestic production activities deductions and foreign income levels that are taxed at rates lower than the U.S. statutory rate of 35%.

Income Taxes

9 Months Ended

Sep. 30, 2017

7. Income Taxes

Our effective income tax rates for the three months ended September 30, 2017 and 2016 were 30.4% and 28.2%, respectively. Our effective income tax rates for the nine months ended September 30, 2017 and 2016 were 31.5% and 25.7%, respectively. Our 2016 nine-month period effective income tax rate was favorably impacted by the resolution of a tax position that was previously uncertain, which lowered our 2016 nine-month income tax provision by $17.6 million and our effective income tax rate by 5.3 percentage points. Other permanent items that lowered our effective income tax rates from the federal statutory rate were not materially different during both years and relate mainly to company-owned life insurance policies, domestic production activities deductions and foreign income levels that are taxed at rates lower than the U.S. statutory rate of 35%.