Income Taxes	9 Months Ended
Sep. 30, 2019
Income Taxes [Abstract]
Income Taxes	10. Income Taxes Income tax expense for the nine months ended September 30, 2019 was $13.2 million, or 25.6% of pre-tax income. Income tax expense for the nine months ended September 30, 2018 was $29.2 million, or 29.6% of pre-tax income. The tax expense during the nine months ended September 30, 2019, as a percentage of pre-tax income, is higher than the U.S. federal statutory income tax rate of 21% primarily as a result of foreign statutory rate differences. The tax expense for the nine months ended September 30, 2018, as a percentage of pre-tax income, is higher than the U.S. federal statutory income tax rate of 21% primarily as a result of foreign statutory rate differences and discrete items recorded in the third quarter. The discrete items recorded in the third quarter of 2018 primarily include a reduction to the tax expense related to provision to return adjustments and an increase from the impact of resolving a foreign tax audit.

Income Taxes

9 Months Ended

Sep. 30, 2019

10. Income Taxes

Income tax expense for the nine months ended September 30, 2019 was $13.2 million, or 25.6% of pre-tax income. Income tax expense for the nine months ended September 30, 2018 was $29.2 million, or 29.6% of pre-tax income. The tax expense during the nine months ended September 30, 2019, as a percentage of pre-tax income, is higher than the U.S. federal statutory income tax rate of 21% primarily as a result of foreign statutory rate differences. The tax expense for the nine months ended September 30, 2018, as a percentage of pre-tax income, is higher than the U.S. federal statutory income tax rate of 21% primarily as a result of foreign statutory rate differences and discrete items recorded in the third quarter. The discrete items recorded in the third quarter of 2018 primarily include a reduction to the tax expense related to provision to return adjustments and an increase from the impact of resolving a foreign tax audit.