Income Taxes	9 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s provision for income taxes is based upon estimated annual tax rates for the year applied to federal, state and foreign income. The provision for income taxes increased to $22.8 million in the third quarter of 2013 from $20.1 million in the third quarter of 2012. The effective tax rate decreased to 26.3% for the third quarter of 2013 compared to 28.6% in the third quarter of 2012 due to discrete tax benefits and the mix of global pre-tax income among jurisdictions. The provision for income taxes increased to $72.8 million in the first nine months of 2013 from $65.4 million in the same period of 2012. The effective tax rate decreased to 27.9% for the first nine months of 2013 compared to 29.5% in the same period of 2012 primarily due to discrete tax benefits, the enactment of the American Taxpayer Relief Act of 2012 on January 2, 2013, which reinstated the U.S. R&D credit retroactively to January 1, 2012, as well as the mix of global pre-tax income among jurisdictions. The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. Due to the potential for resolution of federal, state and foreign examinations, and the expiration of various statutes of limitation, it is reasonably possible that the Company’s gross unrecognized tax benefits balance may change within the next twelve months by a range of zero to $1.5 million.

Income Taxes

9 Months Ended

Sep. 30, 2013

The Company’s provision for income taxes is based upon estimated annual tax rates for the year applied to federal, state and foreign income. The provision for income taxes increased to $22.8 million in the third quarter of 2013 from $20.1 million in the third quarter of 2012. The effective tax rate decreased to 26.3% for the third quarter of 2013 compared to 28.6% in the third quarter of 2012 due to discrete tax benefits and the mix of global pre-tax income among jurisdictions.

The provision for income taxes increased to $72.8 million in the first nine months of 2013 from $65.4 million in the same period of 2012. The effective tax rate decreased to 27.9% for the first nine months of 2013 compared to 29.5% in the same period of 2012 primarily due to discrete tax benefits, the enactment of the American Taxpayer Relief Act of 2012 on January 2, 2013, which reinstated the U.S. R&D credit retroactively to January 1, 2012, as well as the mix of global pre-tax income among jurisdictions.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. Due to the potential for resolution of federal, state and foreign examinations, and the expiration of various statutes of limitation, it is reasonably possible that the Company’s gross unrecognized tax benefits balance may change within the next twelve months by a range of zero to $1.5 million.