Income Tax Expense

6 Months Ended

Jun. 30, 2016

Income Tax Disclosure [Abstract]

Income Tax Expense

The effective tax rate for the three months ended June 30, 2016 was 3.9% compared to 22.5% for the three months ended June 30, 2015. The effective tax rate for the six months ended June 30, 2016 was 13.8% compared to 22.7% for the same period in 2015. Income tax expense of $0.7 million in the second quarter of 2016decreased by $9.4 million compared to $10.1 million in the same period in 2015, primarily in the United States as taxable income recognized in the United States decreased by $68.8 million in 2016 compared to 2015. No other jurisdiction in which we operate had a material change in income tax expense.

During the second quarter of 2016, we settled a tax audit covering the years 2010 through 2012 that resulted in the release of reserves for uncertain tax positions in the amount of $0.9 million which contributed to the lower effective tax rate in the quarter.