Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Original maturity period of cash, cash equivalents and investments		Three months or less
Shipping and handling costs		$ 12,600,000	$ 4,300,000	$ 5,600,000
Amortization of landlord funded tenant improvements		12,100,000	6,600,000	4,500,000
Depreciation expense, including amortization of capital leases		$ 88,200,000	90,600,000	71,800,000
Number of reporting units | Segment		3
Goodwill impairment		$ 51,200,000	0	0
Impairment of intangible assets				0
Impairment of definite lived intangible assets		0	0	0
Advertising and sales promotion expense		$ 17,500,000	$ 19,600,000	$ 16,800,000
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of customer		2	3
Customer 1 [Member] | Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		19.00%	20.00%
Customer 2 [Member] | Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		14.00%	17.00%
Customer 3 [Member] | Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage			14.00%
In-process Research and Development
Summary Of Significant Accounting Policies [Line Items]
In-process R&D written off			$ 2,200,000
Cloud Tv Reporting Unit
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment	$ 51,200,000	$ 51,200,000
Cloud Tv Reporting Unit | Trade Names [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of intangible assets	3,800,000	3,800,000
Non-controlling Interest | Cloud Tv Reporting Unit
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment	17,900,000	$ 17,900,000
Non-controlling Interest | Cloud Tv Reporting Unit | Trade Names [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of intangible assets	$ 1,300,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage	20.00%	20.00%
Finite lived intangible assets, useful life		1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%
Finite lived intangible assets, useful life		13 years
Building and Building Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life		10 years
Building and Building Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life		40 years
Machinery and Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life		2 years
Machinery and Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life		10 years
Internal Use Software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life		2 years
Internal Use Software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life		7 years