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Accounts Payable And Accrued Expenses (Schedule Of Accounts Payable And Accrued Expenses) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts payable $ 9,970 $ 12,264
Accrued salaries and bonuses 131,593 147,613
Accrued payroll taxes and benefits 37,488 29,443
Accrued contingent consideration 17,164 12,089
Accrued professional liabilities 13,821 13,218
Accrual for uncertain tax positions 3,242 3,242
Other accrued expenses 11,632 16,666
Accounts payable and accrued expenses $ 224,910 $ 234,535