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SUPPLEMENTAL BALANCE SHEET INFORMATION Other long-term liabilities (Details) - USD ($) $ in Thousands	Sep. 23, 2020	Dec. 25, 2019
Other Liabilities Disclosure [Abstract]
Contract with Customer, Liability, Noncurrent	$ 12,144	$ 11,310
Finance Lease, Liability, Noncurrent	3,492	3,643
Other Sundry Liabilities, Noncurrent	6,192	375
Other Liabilities, Noncurrent	21,828	$ 15,328
Deferred lease incentive liabilities	3,388
Deferred social security taxes	$ 2,461

X

- Definition

Other Liabilities, Noncurrent, Deferred Lease Incentive

+ References

No definition available.

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- Definition

Other Liabilities, Noncurrent, Deferred Social Security Taxes

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X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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-Publisher FASB
-Name Accounting Standards Codification
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Obligations not otherwise itemized or categorized in the footnotes to the financial statements that are expected to be paid after one year (or the normal operating cycle, if longer), from the balance sheet date.

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