Accounts Receivable (Impact Of Accounts Receivable Reserves And Allowance For Doubtful Accounts On The Gross Trade Accounts Receivable Balances) (Details) (USD $) In Thousands, unless otherwise specified					6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2012 Chargebacks [Member]	Dec. 31, 2011 Chargebacks [Member]	Jun. 30, 2012 Rebates and incentive programs [Member]	Dec. 31, 2011 Rebates and incentive programs [Member]	Jun. 30, 2012 Returns [Member]	Dec. 31, 2011 Returns [Member]	Jun. 30, 2012 Cash discounts and other [Member]	Dec. 31, 2011 Cash discounts and other [Member]
Accounts Receivable [Line Items]
Gross trade accounts receivable	$ 311,189	$ 269,204
Deductions from trade accounts receivable					(28,698)	(20,688)	(44,824)	(35,132)	(60,406)	(58,672)	(21,105)	(28,672)
Allowance for doubtful accounts	(89)	(100)	0	(1)
Accounts Receivable, Net, Current	$ 156,067	$ 125,940