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SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) - USD ($) $ in Thousands | Sep. 23, 2020 | Dec. 25, 2019
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Supplemental Balance Sheet Disclosures [Abstract] |  |
Finance Lease, Liability, Current | $ 1,740 | $ 1,873
Other Liabilities, Current |  |
Sales tax payable | 3,202 | 4,086
Current portion of liabilities under tax receivable agreement | 0 | 7,777
Gift card liability | 2,205 | 2,258
Other | 5,433 | 3,505
Other current liabilities | $ 12,580 | $ 19,499

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