Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 29, 2018	Dec. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Banker's acceptance drafts, maturity period	6 months
Banker's acceptance drafts with recourse	$ 11,105	$ 10,035

The amount of the financial institution's obligation to pay the holder of the customer's draft which the financial institution has guaranteed (i.e., Banker's Acceptance).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.14)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_BankAcceptancesExecuted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant