Commitments and Contingencies (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 01, 2011 USD ($)	Oct. 02, 2010 USD ($)	Oct. 01, 2011 USD ($)	Oct. 02, 2010 USD ($)	Oct. 01, 2011 BRL	Jan. 01, 2011 USD ($)	Sep. 30, 2002 BRL
Commitments and Contingencies (Textual)
Principal amount of commercial taxes assessed on purchases of imported software	$ 6,900		$ 6,900			$ 7,600	12,700
Exchange rate of Brazilian reais to the U.S. dollar	1.854		1.854			1.666
Potential amount of interest and penalties to be assessed related to commercial taxes on purchases of imported software	14,100		14,100
Amount of taxes and penalties assessed related to commercial services taxes based upon sale of software	29,700		29,700		55,100
Additional potential liability arising from assessment for interest and adjustment for inflation related to a commercial tax based upon sale of software	52,500		52,500		97,400
Net sales under guarantee arrangements to third parties that provide financing	Less than 1 percent	Less than 1 percent	Less than 1 percent	Less than 1 percent
Maximum amount of reimbursement to third party	$ 11,000	$ 11,000	$ 11,000	$ 11,000