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Subsequent Event - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Subsequent Event [Line Items]          
Net revenues     $ 437,153 $ 183,681  
Data Analytics Solutions Business [Member]          
Subsequent Event [Line Items]          
Net revenues         $ 12,700
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Proceeds from sale of business unit $ 80,000        
Scenario, Forecast [Member]          
Subsequent Event [Line Items]          
Pre-tax gain   $ 75,000