Business Segments and Enterprise-Wide Information (Schedule Of Contributions By Major Customers) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Wal-Mart Stores Inc. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	15.40%	14.90%	15.30%	15.10%
Walgreen Co. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	13.20%	14.30%	13.70%	14.70%
The Kroger Company [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	9.80%	9.80%	9.80%	10.00%