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Balance Sheet Details (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Balance Sheet Details [Line Items]    
Prepaid expenses $ 30,906 $ 27,647
Other current assets 18,540 9,891
Income tax receivable 12,354 14,003
Prepaid expenses and other current assets 61,800 51,541
Accounts payable 14,467 10,139
Accrued expenses 53,164 44,424
Accrued contingent consideration 21,034 8,201
Accrued interest payable 9,479 9,048
Accrued taxes payable 9,323 11,114
Other current liabilities 19,419 15,183
Accounts payable, accrued expenses and other, Total $ 126,886 $ 98,109