Business Segments and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Pre-Tax Income Reconciliation of Segments
Total operating income from segments	$ 83,506	$ 76,623	$ 153,428	$ 149,245
Unallocated Amount:
General and Administrative Expenses	(27,043)	(27,710)	(54,484)	(60,498)
Net interest expense	(18,856)	(17,783)	(37,856)	(33,175)
Income before income taxes, equity in earnings of affiliates and discontinued operations	$ 37,607	$ 31,130	$ 61,088	$ 55,572