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Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - Precisive, LLC [Member] - USD ($) $ in Thousands		12 Months Ended
	Mar. 17, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 5,110	$ 5,110
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets		820
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 1,430	1,430
Patents, Trademarks, Trade Names and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets		$ 2,860

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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