Accounts Receivable (Narrative) (Details)	3 Months Ended			3 Months Ended
	Mar. 31, 2012	Mar. 31, 2012 Wholesale Distribution Channel [Member]	Mar. 31, 2011 Wholesale Distribution Channel [Member]	Mar. 31, 2012 Maximum [Member]	Mar. 31, 2012 Minimum [Member]
Accounts Receivable [Line Items]
Net product sales, percentage		61.00%	60.00%
Process period for accounts receivable reserves and allowances, except for product returns allowance, in months				4	2
Shelf-lives of products sold, in months				48	12
Cash discount to customers, percentage of sales price	2.00%
Invoice period for customers to avail cash discount, days				90	30