Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE G - Income Taxes The effective income tax rate in the third quarter of 2015 of 31.0% decreased from 32.8% in the same period of 2014, and the effective income tax rate in the first nine months of 2015 of 31.6% decreased from 33.0% in the same period of 2014. The lower effective tax rates for the third quarter and first nine months were primarily due to an increase in research tax credits in 2015.

Income Taxes

9 Months Ended

Sep. 30, 2015

NOTE G - Income Taxes

The effective income tax rate in the third quarter of 2015 of 31.0% decreased from 32.8% in the same period of 2014, and the effective income tax rate in the first nine months of 2015 of 31.6% decreased from 33.0% in the same period of 2014. The lower effective tax rates for the third quarter and first nine months were primarily due to an increase in research tax credits in 2015.