Accounts Receivable (Schedule Of Gross Accounts Receivable By Major Customers Type) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Accounts Receivable [Line Items]
Total gross accounts receivable	100.00%	100.00%
Cardinal Health, Inc. [Member]
Accounts Receivable [Line Items]
Total gross accounts receivable	27.00%	19.00%
McKesson Corporation [Member]
Accounts Receivable [Line Items]
Total gross accounts receivable	24.00%	25.00%
CVS Caremark [Member]
Accounts Receivable [Line Items]
Total gross accounts receivable	17.00%	17.00%
AmerisourceBergen Corporation [Member]
Accounts Receivable [Line Items]
Total gross accounts receivable	11.00%	12.00%
Other Customers [Member]
Accounts Receivable [Line Items]
Total gross accounts receivable	21.00%	27.00%