Taxes (Tables)

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Reconciliation of United States Federal Statutory Corporate Tax Rate to Company's Effective Tax Rate, or Income Tax Provision

A reconciliation of the United States federal statutory corporate tax rate to the Company’s effective tax rate, or income tax provision, was as follows:

	Three-months Ended						Six-months Ended
	June 30, 2013			July 1, 2012			June 30, 2013			July 1, 2012
Income tax at federal statutory rate		35	%		35	%		35	%		35	%
State income taxes, net of federal benefit		2			1			2			1
Foreign tax rate differential		(17	)		(15	)		(17	)		(15	)
2013 research and development credit		(1	)		—			(1	)		—
Discrete event - 2012 research and development credit		—			—			(1	)		—
Income tax provision		19	%		21	%		18	%		21	%