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Schedule of Derivative Instruments (Detail) - USD ($) $ in Thousands	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017
Derivative [Line Items]
Derivative, Notional Amount									$ 51,300
Subsequent Event [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ (259)	$ 86	$ (152)	$ (433)	$ (703)	$ (867)	$ (1,055)	$ (1,120)
Subsequent Event [Member] | Mexico, Pesos
Derivative [Line Items]
Derivative, Notional Amount	152,613	148,468	142,947	137,944	125,328	90,443	95,500	90,812
Subsequent Event [Member] | United States of America, Dollars
Derivative [Line Items]
Derivative, Notional Amount	$ 7,187	$ 6,740	$ 6,828	$ 6,979	$ 6,746	$ 5,301	$ 5,811	$ 5,713

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611

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