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Business Segment, Geographic Area, Product and Significant Customer Information - Worldwide Net Revenue for Each Group of Products (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue from External Customer [Line Items]
Net sales from product groups	$ 437,153	$ 183,681
Analytical and Control Solutions Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	31,820	22,978
Materials Delivery Solutions Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	43,454	27,509
Power Plasma and Reactive Gas Solutions Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	122,800	77,116
Pressure and Vacuum Measurement Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	79,910	$ 56,078
Lasers Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	44,944
Optics Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	46,505
Photonics Products [Member]
Revenue from External Customer [Line Items]
Net sales from product groups	$ 67,720

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+ References

No definition available.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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