Acquisitions - Schedule of Purchase Price Allocation (Parenthetical) (Detail)	Sep. 11, 2015
Developed technology [Member] \| Rising Tide Games [Member]
Business Acquisition [Line Items]
Intangible assets, useful life	5 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Balance Type:	na
Period Type:	duration