PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Benefit Payments) (Details) $ in Thousands	Dec. 27, 2020 USD ($)
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
2021	$ 26,629
2022	16,912
2023	16,411
2024	16,043
2025	15,612
2026-2030	71,456
Total	163,063
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
2021	169
2022	163
2023	156
2024	149
2025	140
2026-2030	555
Total	$ 1,332

Defined Benefit Plan, Expected Future Benefit Payments

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Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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