SEGMENT INFORMATION - Sales and Operating Income of Segments (Details) $ in Thousands	3 Months Ended
Mar. 29, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments (in segments) \| segment	2
Total sales	$ 589,232	$ 608,218
Operating income	39,279	35,826
Intersegment sales
Segment Reporting Information [Line Items]
Total sales	8,873	8,885
Operating Segments
Segment Reporting Information [Line Items]
Total sales	598,105	617,103
Operating income	55,672	52,728
Manufacturing
Segment Reporting Information [Line Items]
Total sales	419,266	425,684
Manufacturing \| Intersegment sales
Segment Reporting Information [Line Items]
Total sales	7,573	7,720
Manufacturing \| Operating Segments
Segment Reporting Information [Line Items]
Total sales	426,839	433,404
Operating income	45,704	44,437
Distribution
Segment Reporting Information [Line Items]
Total sales	169,966	182,534
Distribution \| Intersegment sales
Segment Reporting Information [Line Items]
Total sales	1,300	1,165
Distribution \| Operating Segments
Segment Reporting Information [Line Items]
Total sales	171,266	183,699
Operating income	$ 9,968	$ 8,291

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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