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Stockholders' Equity - Schedule of Share Based Compensation Stock Option Activity (Detail) - Zynga Stock Options [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock Options Outstanding, Beginning balance 36,185  
Stock Options, Granted 4,647  
Stock Options, Exercised (3,835)  
Stock Options Outstanding, Ending balance 36,997 36,185
Outstanding Options, Weighted Average Exercise Price, Beginning Balance $ 2.35  
Weighted Average Exercise Price, Granted 5.37  
Weighted Average Exercise Price, Forfeited, expired and cancelled 2.80  
Weighted Average Exercise Price, Exercised 0.37  
Outstanding Options, Weighted Average Exercise Price, Ending Balance $ 2.93 $ 2.35
Outstanding Options, Aggregate Intrinsic Value of Stock Options Outstanding $ 88,970 $ 57,510
Outstanding Options, Weighted Average Contractual Term (in years) 7 years 21 days 6 years 2 months 23 days