Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (Allowance For Sales Adjustments And Uncollectible Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Allowance For Sales Adjustments And Uncollectible Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 48,403		$ 41,560		$ 47,071
Charged to Expenses	36,950		31,849		23,257
Net Sales Adjustments and Other	10,081	[1]	0	[1]	(5,894)	[1]
Deductions	40,108	[2]	25,006	[2]	22,874	[2]
Balance at End of Period	$ 55,326		$ 48,403		$ 41,560

[1] To record net sales adjustments and allowances on business combinations.

[2] To record write-offs, net of recoveries.