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Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 30, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)	Dec. 29, 2018 USD ($)	Dec. 30, 2018
Accounting Policies [Abstract]
Number of reportable segments | Segment	3
Bank guarantees, expiration period	12 months
Banker's acceptance drafts, maturity period	6 months
Banker's acceptance drafts	$ 7,772		$ 7,976
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Currency Translation	(7,387)		$ (6,829)
Revenue recognized	$ 19,095	$ 27,325
Assets | ASU No. 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption, percent				2.30%
Liabilities | ASU No. 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption, percent				4.80%

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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.

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-Name Accounting Standards Codification
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Amounts receivable from customers on short-term negotiable time drafts drawn on and accepted by the institution (also known as banker's acceptance transactions) that are outstanding on the reporting date.

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