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Income Taxes	3 Months Ended
	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Provision for income taxes was $47.3 million resulting in an effective tax rate of 25.2 percent compared to expense of $44.8 million resulting in an effective tax rate of 25.3 percent for the three months ended March 31, 2013 and 2012, respectively.

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The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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