Income Taxes (Schedule Of Provision For Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
US Federal, Current	$ 33,689	$ 21,157	$ 40,926
US Federal, Deferred	(1,930)	(9,351)	(3,795)
US Federal, Income tax provision	31,759	11,806	37,131
US State, Current	4,273	5,169	2,496
US State, Deferred	(1,280)	(3,370)	505
US State, Income tax provision	2,993	1,799	3,001
Foreign, Current	19,470	17,278	9,939
Foreign, Deferred	(14,514)	(12,338)	(12,597)
Foreign, Income tax provision	4,956	4,940	(2,658)
Income tax provision	$ 39,708	$ 18,545	$ 37,474
Effective tax rate	17.00%	11.00%	27.00%