Income Taxes	3 Months Ended
Mar. 31, 2013
Income Taxes	18. 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 $24.1 million in the first quarter of 2013 from $21.9 million in the first quarter of 2012. The effective tax rate decreased to 28.2% for the first quarter of 2013 compared to 29.5% in the first quarter of 2012 primarily due to 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 $2.7 million.

Income Taxes

3 Months Ended

Mar. 31, 2013

18. 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 $24.1 million in the first quarter of 2013 from $21.9 million in the first quarter of 2012. The effective tax rate decreased to 28.2% for the first quarter of 2013 compared to 29.5% in the first quarter of 2012 primarily due to 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 $2.7 million.