Income Taxes	6 Months Ended
Jun. 30, 2017
Income Taxes
Income Taxes	7. Income Taxes Our effective income tax rates for the three months ended June 30, 2017 and 2016 were 31.2% and 32.7%, respectively. Our effective income tax rates for the six months ended June 30, 2017 and 2016 were 32.0% and 25.0%, respectively. Our 2016 six-month period effective income tax rate was favorably impacted by the resolution of a tax position that was previously uncertain, which lowered our 2016 six-month income tax provision by $17.6 million and our effective income tax rate by 6.7%. 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

6 Months Ended

Jun. 30, 2017

7. Income Taxes

Our effective income tax rates for the three months ended June 30, 2017 and 2016 were 31.2% and 32.7%, respectively. Our effective income tax rates for the six months ended June 30, 2017 and 2016 were 32.0% and 25.0%, respectively. Our 2016 six-month period effective income tax rate was favorably impacted by the resolution of a tax position that was previously uncertain, which lowered our 2016 six-month income tax provision by $17.6 million and our effective income tax rate by 6.7%. 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%.