Cash And Cash Equivalents And Advertising Accounting Policies (Effect Of Reclassification Of Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cost of sales, including advertising, warehousing and distribution expenses	$ 641,199	$ 623,193
Gross profit on sales	234,907	229,036
Operating, general and administrative expenses	$ 212,068	208,786
As Previously Reported [Member]
Cost of sales, including advertising, warehousing and distribution expenses		622,433
Gross profit on sales		229,796
Operating, general and administrative expenses		209,546
Reclassifications [Member]
Cost of sales, including advertising, warehousing and distribution expenses		760
Gross profit on sales		(760)
Operating, general and administrative expenses		$ (760)