Business Combinations and Divestitures - Additional Information (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 27, 2014	Oct. 31, 2014	Oct. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 13, 2016	Oct. 15, 2014
Business Acquisition [Line Items]
Proceeds from divestiture of business				$ 39,000	$ 0	$ 0
Goodwill impairment charge-wireless LAN divestiture				(32,000)
Term Loan
Business Acquisition [Line Items]
Business acquisition, borrowings	$ 2,200,000
Senior Notes
Business Acquisition [Line Items]
Senior notes, stated interest percentage								7.25%
Enterprise Business
Business Acquisition [Line Items]
Preliminary purchase price	$ 3,450,000	$ 3,450,000		3,450,000
Ownership percentage of the Enterprise Business	100.00%
Business acquisition, borrowings				3,250,000
Business acquisition, consideration paid					52,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred					$ (2,000)
Business acquisition goodwill amount	$ 2,300,000
Enterprise Business | Term Loan
Business Acquisition [Line Items]
Business acquisition, borrowings				$ 2,200,000
Senior notes, maturity year				2021
Senior Notes due 2022 | Enterprise Business | Senior Notes
Business Acquisition [Line Items]
Business acquisition, borrowings				$ 1,050,000
Senior notes, stated interest percentage				7.25%
Senior notes, maturity year				2022
Wireless LAN (WLAN)
Business Acquisition [Line Items]
Revenue from sale of assets				$ 30,000
Wireless LAN (WLAN) | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Divestiture of business disposal price							$ 55,000
Proceeds from divestiture of business				39,000
Loss on write-down			$ 62,000
Goodwill impairment charge-wireless LAN divestiture			(32,000)
Disposal Group, Including Discontinued Operation, Revenue				78,000
Gross profit from sale of assets				37,000
Disposal Group, Including Discontinued Operation, Assets				0
Disposal Group, Including Discontinued Operation, Liabilities				$ 0
Wireless LAN (WLAN) | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Other Intangible Assets
Business Acquisition [Line Items]
Revenue from sale of assets			$ 30,000