Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018
Change in Contract with Customer, Liability
Balance as of January 1	$ 9,896	$ 9,970
Increases due to cash received	61,844	61,069
Revenue recognized during the period	(62,607)	(60,078)
Liabilities assumed due to acquisition	0	747
Currency translation	(339)	(738)
Balance at period end	$ 8,794	$ 10,970

Change in Contract with Customer, Liability [Roll Forward]

No definition available.

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- Definition

Contract with Customer, Liability, Currency Translation

+ References

No definition available.

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- Definition

Contract with Customer, Liability, Increase from Cash Receipts

+ References

No definition available.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

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- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from business combination.

+ 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
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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