Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Business Acquisitions (Schedule of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands			3 Months Ended
	Aug. 11, 2017	Apr. 20, 2016	Dec. 31, 2016
Astro Gaming
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 52,520
Total intangible assets	$ 52,520
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 9 months 17 days
Jaybird LLC of Salt Lake City
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 47,730
Estimated useful life		6 years 1 month 6 days
Total intangible assets		$ 50,280
Developed technology \| Astro Gaming
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 12,540
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years
Developed technology \| Jaybird LLC of Salt Lake City
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 18,450
Estimated useful life		4 years	5 years
Customer relationships \| Astro Gaming
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 33,100
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Customer relationships \| Jaybird LLC of Salt Lake City
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 19,900
Estimated useful life		8 years
Trade name \| Astro Gaming
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 6,880
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
Trade name \| Jaybird LLC of Salt Lake City
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 9,380
Estimated useful life		6 years
In-process research & development (IPR&D) \| Jaybird LLC of Salt Lake City
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired		$ 2,550