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Acquisitions and Dispositions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended			9 Months Ended		12 Months Ended
	Jul. 31, 2017	Apr. 30, 2017	Apr. 30, 2016	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Apr. 29, 2016
Business Acquisition [Line Items]
Business acquisition share price										$ 23.00
Stock-based compensation expense				$ 4,845		$ 5,158	$ 19,834	$ 19,826
Total proceeds from sale of business unit, net of cash sold		$ 72,509					72,509
Pre-tax gain		$ 74,856					74,856
Net revenues				486,267		380,660	1,404,177	890,202
Data Analytics Solutions Business [Member]
Business Acquisition [Line Items]
Net revenues									$ 12,700
Minority Interest in Private Company [Member]
Business Acquisition [Line Items]
Investments in minority interest	$ 100		$ 9,300
Impairment charges					$ 5,000				$ 5,000
Newport [Member]
Business Acquisition [Line Items]
Business acquisition share price										$ 23.00
Fair value write-up of acquired finished goods inventory				15,090			15,090
Incremental costs of sales charge						4,971		15,090
Fair value write-up of acquired property, plant and equipment				$ 36,242			$ 36,242
Compensation expense						6,631		6,631
Stock-based compensation expense						$ 3,334		$ 3,334

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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