XML 31 R18.htm IDEA: XBRL DOCUMENT

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate for the three months ended June 30, 2020 and 2019 was 20.9% and 24.2%, respectively, and 18.8% and 23.0% for the six months ended June 30, 2020 and 2019, respectively. Our effective tax rate for the three and six months ended June 30, 2020 and June 30, 2019 differs from our statutory rate primarily due to the effect of excess tax benefits related to the vesting of restricted shares of our common stock and higher than expected research and experimentation tax credits.