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Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

Schedule of Deferred Revenue by Arrangement

A rollforward of the Company’s deferred revenue is as follows:

		Nine Months Ended September 30, 2018
Beginning balance, January 1(1)		$	14,448
Amount of deferred revenue recognized in income			(15,846	)
Additions to deferred revenue			13,869
Ending balance, September 30(2)		$	12,471

⁽¹⁾ Beginning deferred revenue as of January 1, 2018 included $11,322 of current deferred revenue and $3,126 of long-term deferred revenue.

⁽²⁾ Ending deferred revenue as of September 30, 2018 included $9,136 of current deferred revenue and $3,335 of long-term deferred revenue.

Summary of Revenue from Contracts with Customers

The following table summarizes revenue from contracts with customers:

		Three Months Ended September 30, 2018
		Vacuum & Analysis				Light & Motion				Total
Net revenues:
Products		$	239,924			$	186,331			$	426,255
Services			46,114				14,783				60,897
Total net revenues		$	286,038			$	201,114			$	487,152

		Three Months Ended September 30, 2017
		Vacuum & Analysis				Light & Motion				Total
Net revenues:
Products		$	265,136			$	163,755			$	428,891
Services			43,133				14,243				57,376
Total net revenues		$	308,269			$	177,998			$	486,267

		Nine Months Ended September 30, 2018
		Vacuum & Analysis				Light & Motion				Total
Net revenues:
Products		$	865,714			$	567,217			$	1,432,931
Services			136,996				44,640				181,636
Total net revenues		$	1,002,710			$	611,857			$	1,614,567

		Nine Months Ended September 30, 2017
		Vacuum & Analysis				Light & Motion				Total
Net revenues:
Products		$	776,256				466,890			$	1,243,146
Services			119,958				41,073				161,031
Total net revenues		$	896,214			$	507,963			$	1,404,177

X

- Definition

Tabular disclosure of contract balances and changes in contract balances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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