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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 25, 2019 | Sep. 23, 2020 | Sep. 25, 2019 | Dec. 25, 2019 | Sep. 30, 2017
Loss Contingencies [Line Items] |  |  |  |  |
Litigation Settlement, Expense |  | $ 1,200 |  |  |
Loss Contingency Accrual |  | $ 1,180 |  |  |
Percentage of tax benefits due to equity owners |  | 85.00% |  |  |
Establishment of liabilities under tax receivable agreement | $ 20,027 | $ 414 | $ 20,027 |  |
Tax receivable agreement liability |  | 228,197 |  | $ 234,426 |
Retail site |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Letters of credit outstanding |  | $ 130 |  |  |
Office building |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Letters of credit outstanding |  |  |  |  | $ 603
Renewal term |  | 1 year |  |  |

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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
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