Accounts Receivable (Schedule Of Gross Accounts Receivable By Major Customers Type) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Gross accounts receivable	100.00%	100.00%
McKesson Corporation [Member]
Gross accounts receivable	28.00%	25.00%
Cardinal Health, Inc. [Member]
Gross accounts receivable	18.00%	21.00%
CVS Caremark [Member]
Gross accounts receivable	17.00%	14.00%
AmerisourceBergen Corporation [Member]
Gross accounts receivable	14.00%	12.00%
Other Customers [Member]
Gross accounts receivable	23.00%	28.00%