Annual report pursuant to Section 13 and 15(d)

Acquisitions and Disposals - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail)

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Acquisitions and Disposals - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Mar. 31, 2015
Mar. 06, 2015
Mar. 31, 2014
Apr. 12, 2013
Mar. 31, 2013
Business Acquisition [Line Items]            
Goodwill $ 76,621 $ 76,747   $ 4,837   $ 3,588
Mirror Image International Holdings Pvt Ltd            
Business Acquisition [Line Items]            
Cash         $ 513  
Accounts receivable         2,809  
Prepaid expenses and other assets         896  
Property, plant and equipment         300  
Goodwill         2,654  
Accounts payable         (1,151)  
Accrued liabilities         (2,890)  
Accrued compensation         (345)  
Purchase price         8,140  
Mirror Image International Holdings Pvt Ltd | Customer relationships            
Business Acquisition [Line Items]            
Amortizable intangible assets         1,600  
Mirror Image International Holdings Pvt Ltd | Developed technology            
Business Acquisition [Line Items]            
Amortizable intangible assets         3,400  
Mirror Image International Holdings Pvt Ltd | Trade name/trademark            
Business Acquisition [Line Items]            
Amortizable intangible assets         54  
Mirror Image International Holdings Pvt Ltd | Library            
Business Acquisition [Line Items]            
Amortizable intangible assets         $ 300  
DT Media (Appia)            
Business Acquisition [Line Items]            
Cash     $ 1,363      
Accounts receivable     7,364      
Prepaid expenses and other assets     171      
Property, plant and equipment     229      
Goodwill $ 69,312   69,312      
Accounts payable     (5,179)      
Accrued liabilities     (4,531)      
Debt     (11,600)      
Purchase price     74,909      
DT Media (Appia) | Developed technology            
Business Acquisition [Line Items]            
Amortizable intangible assets     7,700      
DT Media (Appia) | Trade name/trademark            
Business Acquisition [Line Items]            
Amortizable intangible assets     380      
DT Media (Appia) | Advertiser relationships            
Business Acquisition [Line Items]            
Amortizable intangible assets     6,500      
DT Media (Appia) | Publisher relationships            
Business Acquisition [Line Items]            
Amortizable intangible assets     $ 3,200