Goodwill and Intangible Assets (Detail) - USD ($)	3 Months Ended	9 Months Ended	14 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Goodwill
Goodwill impairment			$ 0
Balance as of December 31, 2015		$ 56,006,000
Measurement-period adjustments		6,367,000
Balance as of September 30, 2016	$ 62,373,000	62,373,000	62,373,000
Other intangible assets:
Total intangible assets	841,635,000	841,635,000	841,635,000	$ 841,560,000
Accumulated Amortization	(46,389,000)	(46,389,000)	(46,389,000)	(16,504,000)
Net, finite-lived intangible assets	757,746,000	757,746,000	757,746,000
Total intangible assets, net	$ 795,246,000	795,246,000	795,246,000	825,056,000
Weighted average
Other intangible assets:
Useful life	18 years 8 months 12 days
Trade name
Other intangible assets:
Gross carrying amount, indefinite-lived	$ 35,500,000	35,500,000	35,500,000	35,500,000
Service provider network
Other intangible assets:
Gross carrying amount, indefinite-lived	2,000,000	2,000,000	2,000,000	2,000,000
Developed technology
Other intangible assets:
Gross carrying amount, finite-lived	757,000,000	757,000,000	757,000,000	757,000,000
Accumulated Amortization	(45,803,000)	(45,803,000)	(45,803,000)	(16,360,000)
Net, finite-lived intangible assets	$ 711,197,000	711,197,000	711,197,000	740,640,000
Developed technology | Weighted average
Other intangible assets:
Useful life	18 years 8 months 12 days
In-process research and development
Other intangible assets:
Gross carrying amount, finite-lived	$ 39,000,000	39,000,000	39,000,000	39,000,000
Accumulated Amortization	(181,000)	(181,000)	(181,000)	0
Net, finite-lived intangible assets	$ 38,819,000	38,819,000	38,819,000	39,000,000
In-process research and development | Weighted average
Other intangible assets:
Useful life	17 years 1 month 6 days
Customer relationships
Other intangible assets:
Gross carrying amount, finite-lived	$ 8,000,000	8,000,000	8,000,000	8,000,000
Accumulated Amortization	(389,000)	(389,000)	(389,000)	(139,000)
Net, finite-lived intangible assets	$ 7,611,000	7,611,000	7,611,000	7,861,000
Customer relationships | Weighted average
Other intangible assets:
Useful life	23 years 1 month 6 days
Software
Other intangible assets:
Gross carrying amount, finite-lived	$ 135,000	135,000	135,000	60,000
Accumulated Amortization	(16,000)	(16,000)	(16,000)	(5,000)
Net, finite-lived intangible assets	$ 119,000	$ 119,000	$ 119,000	$ 55,000
Software | Weighted average
Other intangible assets:
Useful life	4 years 1 month 6 days