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Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
2 Months Ended 3 Months Ended
Feb. 14, 2017
Feb. 16, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Subsequent Event [Line Items]          
Treasury stock acquired, average cost per share     $ 2.76 $ 2.40 $ 2.60
Stock repurchase program, aggregate number of shares repurchased value     $ 34.2 $ 101.9 $ 98.9
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Stock repurchase program, number of shares repurchased   10.6      
Treasury stock acquired, average cost per share   $ 2.60      
Stock repurchase program, aggregate number of shares repurchased value   $ 27.8      
Subsequent Event [Member] | Solitaire Mobile Gaming Application [Member]          
Subsequent Event [Line Items]          
Cash consideration $ 42.5