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Accounts Payable And Accrued Expenses (Schedule Of Accounts Payable And Accrued Expenses) (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts payable $ 12,104 $ 12,264
Accrued salaries and bonuses 91,235 147,613
Accrued payroll taxes and benefits 30,596 29,443
Accrued contingent consideration 14,234 12,089
Accrued professional liabilities 14,087 13,218
Accrual for uncertain tax positions 3,242 3,242
Other accrued expenses 14,910 16,666
Accounts payable and accrued expenses, total $ 180,408 $ 234,535