Income Taxes	3 Months Ended
Mar. 31, 2014
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 $29.7 million in the first quarter of 2014 from $24.1 million in the first quarter of 2013. The effective tax rate increased to 28.5% for the first quarter of 2014 compared to 28.2% in the first quarter of 2013 due to the mix of global pre-tax income among jurisdictions. Additionally, the current quarter tax rate was favorably impacted by settlements with taxing authorities primarily related to purchase price adjustments for prior period acquisitions and the comparable quarter tax rate in the prior year was favorably impacted by 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. 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 $1.0 million.

Income Taxes

3 Months Ended

Mar. 31, 2014

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 $29.7 million in the first quarter of 2014 from $24.1 million in the first quarter of 2013. The effective tax rate increased to 28.5% for the first quarter of 2014 compared to 28.2% in the first quarter of 2013 due to the mix of global pre-tax income among jurisdictions. Additionally, the current quarter tax rate was favorably impacted by settlements with taxing authorities primarily related to purchase price adjustments for prior period acquisitions and the comparable quarter tax rate in the prior year was favorably impacted by 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.

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 $1.0 million.