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Accrued Expenses and Other Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Accrued Liabilities and Other Liabilities [Abstract]    
Income taxes payable $ 5,464 $ 17,388
Accrued products and licenses costs 54,364 44,417
Marketing expenses payable 20,771 19,208
Legal accrual 55,530 57,970
Other accrued expenses 39,446 48,004
Accrued expenses and other liabilities total $ 175,575 $ 186,987