Income Taxes (Tables)

9 Months Ended

Sep. 30, 2012

Income Tax Disclosure [Abstract]

Reconciliation between the U.S. federal statutory tax rate and effective tax rate

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2012		2011		2012		2011
Statutory rate	35.0	%	35.0	%	35.0	%	35.0	%
State taxes	0.8		1.3		0.8		1.4
Taxes on foreign earnings	(7.1	)	(3.8	)	(7.6	)	(5.4	)
Credits and net operating loss utilization	(3.4	)	(5.1	)	(3.7	)	(3.8	)
Purchased intangible assets	1.3		1.1		1.2		1.3
Permanent items	(2.1	)	(1.2	)	(2.7	)	(1.2	)
Contingent consideration	0.7		—		0.5		—
Other	(0.5	)	(0.9	)	—		(1.3	)
Effective tax rate	24.7	%	26.4	%	23.5	%	26.0	%