Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) vote segment reporting_unit	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 vote class	Jul. 02, 2016 class
Significant Accounting Policies [Line Items]
Best estimated selling price on upgrade rights	$ 0.99
OTTI investment loss	0
Foreign currency transaction gains (losses)	(3,600,000)	$ 4,600,000	$ 2,600,000
Capitalized software costs	$ 4,000,000.0	2,600,000
Number of operating segments | segment	1
Number of reporting units | reporting_unit	1
Advertising and promotion expenses	$ 170,400,000	161,500,000	226,300,000
Cooperative advertising and promotion expense	$ 89,800,000	80,300,000	45,000,000.0
Product warranty term	1 year
Number of classes of stock | class				2	2
Net cash provided by operations	$ (156,832,000)	113,207,000	64,241,000
Net cash provided by financing activities	8,406,000	(1,287,000)	$ (4,635,000)
Estimated operating lease liability	91,413,000
Sales returns reserve	$ 101,326,000	$ 104,001,000
Common Class A [Member]
Significant Accounting Policies [Line Items]
Common stock, votes per share | vote	1			1
Common Class B [Member]
Significant Accounting Policies [Line Items]
Common stock, votes per share | vote	10			10
European Union [Member]
Significant Accounting Policies [Line Items]
Product warranty term	2 years
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated selling price	$ 1.00
Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated selling price	$ 3.00
Subscription-based Premium Services [Member] | Customer Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Percent of revenue (less than)	2.00%