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Schedule II: Valuation And Qualifying Accounts (Schedule II: Valuation And Qualifying Accounts) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]      
Valuation allowance for deferred tax assets, acquisitions $ 7,500,000 $ 9,900,000  
Accounts Receivable Allowances [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 150,942,000 [1] 132,810,000 [1] 90,694,000 [1]
Additions/Charged to Expense 1,228,006,000 [1] 818,132,000 [1] 606,504,000 [1]
Deductions 1,172,958,000 [1] 800,000,000 [1] 564,388,000 [1]
Balance at End of Period 205,990,000 [1] 150,942,000 [1] 132,810,000 [1]
Valuation Allowances For Deferred Tax Assets [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 13,040,000 [2] 1,078,000 [2] 0 [2]
Additions/Charged to Expense 436,000 [2] 12,127,000 [2] 15,103,000 [2]
Deductions 4,267,000 [2] 165,000 [2] 14,025,000 [2]
Balance at End of Period $ 9,209,000 [2] $ 13,040,000 [2] $ 1,078,000 [2]
[1] Allowances are for doubtful accounts, sales returns, cash discounts and chargebacks.
[2] Valuation allowance for deferred tax assets includes $7.5 million and $9.9 million as of December 31, 2011 and 2010, respectively, related to our acquisitions.