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Selected Quarterly Financial Data (Unaudited) - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Selected Quarterly Financial Data [Line Items]          
Unusual favorable Items   $ 29,500      
Non-cash impairment charge on equity method investment $ 40,000        
Non-cash stock based compensation expense 34,400   $ 90,122 $ 37,649 $ 26,676
Loss on extinguishment of debt   (15,800)   $ (15,764)  
Masternaut [Member]          
Selected Quarterly Financial Data [Line Items]          
Unusual favorable Items $ 74,400        
Brazil [Member] | VB Servicos, Comercio e Administracao LTDA ("VB") [Member]          
Selected Quarterly Financial Data [Line Items]          
Fair value adjustments recorded related to contingent consideration arrangement   28,100      
Brazil [Member] | DB and VB [Member]          
Selected Quarterly Financial Data [Line Items]          
Reversal of other various contingent liabilities   $ 1,400