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					12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2011 Chargebacks [Member]	Dec. 31, 2010 Chargebacks [Member]	Dec. 31, 2011 Rebates And Incentive Programs [Member]	Dec. 31, 2010 Rebates And Incentive Programs [Member]	Dec. 31, 2011 Returns [Member]	Dec. 31, 2010 Returns [Member]	Dec. 31, 2011 Cash Discounts And Other [Member]	Dec. 31, 2010 Cash Discounts And Other [Member]
Accounts Receivable [Line Items]
Gross trade accounts receivable	$ 269,204	$ 203,995
Deductions from trade accounts receivable					(20,688)	(19,482)	(35,132)	(23,273)	(58,672)	(48,928)	(28,672)	(16,606)
Allowance for doubtful accounts	(100)	(1)	(3)	(4)
Accounts receivable, net	$ 125,940	$ 95,705