Business Segments and Enterprise-Wide Information (Schedule Of Contributions By Major Customers) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers			10.00%
Wal-Mart Stores Inc [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	14.90%	15.40%	15.10%	16.30%
Walgreen Co [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	14.30%	15.60%	14.70%	16.10%
Kroger Company [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue contributed by major customers	9.80%	10.60%	10.00%	10.90%