Employee Benefit Plans - Plans with Accumulated Benefit Obligations in Excess of Plan Assets (Details) - Pension benefits - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
U.S. Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated benefit obligation	$ 0	$ 0
Fair value of plan assets	0	0
Non-U.S. Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated benefit obligation	3,047	2,549
Fair value of plan assets	$ 557	$ 426

Amount of accumulated benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920

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- Definition

Fair value of plan assets for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

+ References

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