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Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018
Segment Reporting Information [Line Items]
Net sales	$ 397,879	$ 459,183	$ 803,379	$ 876,996
Long-lived assets	338,500		338,500		$ 339,894
Additions to long-lived assets			29,858	40,315
United States
Segment Reporting Information [Line Items]
Net sales	115,991	137,236	235,519	261,112
Long-lived assets	58,015		58,015		58,691
Additions to long-lived assets			3,454	4,234
China
Segment Reporting Information [Line Items]
Net sales	107,728	127,776	214,593	234,284
Long-lived assets	92,621		92,621		95,806
Additions to long-lived assets			4,958	14,711
Mexico
Segment Reporting Information [Line Items]
Long-lived assets	74,147		74,147		70,495
Additions to long-lived assets			8,727	8,874
Germany
Segment Reporting Information [Line Items]
Long-lived assets	37,976		37,976		36,548
Additions to long-lived assets			3,712	5,182
Philippines
Segment Reporting Information [Line Items]
Long-lived assets	37,275		37,275		32,459
Additions to long-lived assets			6,629	4,241
Other countries(a)
Segment Reporting Information [Line Items]
Net sales	174,160	$ 194,171	353,267	381,600
Long-lived assets	$ 38,466		38,466		$ 45,895
Additions to long-lived assets			$ 2,378	$ 3,073

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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