Business Segments and Enterprise-Wide Information (Schedule Of Contributions By Major Customers) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Wal-Mart Stores Inc. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	15.10%	15.20%	15.20%	15.40%
Walgreen Co. [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	13.70%	14.80%	13.90%	15.00%
The Kroger Company [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	9.90%	10.20%	9.80%	10.20%