Reporting Segment And Geographic Information (Reconciliation Of The Company's Consolidated Segment Operating Income To Consolidated Income Before Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Reporting Segment And Geographic Information [Abstract]
Consolidated segment operating income	$ 327,506	$ 247,536	$ 194,348
Unallocated corporate expense	(71,052)	(55,758)	(52,034)
Acquisition costs	(14,892)	(6,537)	(3,822)
Amortization of purchased intangible assets	(85,160)	(57,639)	(52,672)
Operating income	156,402	127,602	85,820
Non-operating income, net	11,052	13,485	1,801
Income before taxes	$ 167,454	$ 141,087	$ 87,621