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Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jul. 20, 2016
Jun. 30, 2016
Jul. 26, 2016
Subsequent Event [Line Items]      
Dividend payable, date of record   Oct. 03, 2016  
Dividend payable, date to be paid   Oct. 21, 2016  
Olapic Inc [Member]      
Subsequent Event [Line Items]      
Business acquisition, agreement date   Jul. 20, 2016  
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Dividend approved, amount per share     $ 0.11
Subsequent Event [Member] | Olapic Inc [Member]      
Subsequent Event [Line Items]      
Business acquisition, cash purchase price $ 130.0    
Subsequent Event [Member] | Olapic Inc [Member] | Founders and Employees [Member]      
Subsequent Event [Line Items]      
Stock awards issuable upon acquisition $ 19.0