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INCOME TAXES - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 23, 2020 | Sep. 25, 2019 | Sep. 23, 2020 | Sep. 25, 2019 | Dec. 25, 2019
Income Tax Contingency [Line Items] |  |  |  |  |
Effective income tax rate reconciliation (in percentage) | 11.50% | (38.00%) | 21.20% | (0.20%) |
Ownership percentage, weighted average | 92.50% | 85.60% | 92.10% | 82.10% |
Deferred tax asset recognized as a result of investment in partnership |  |  | $ 1,562,000 |  |
Deferred tax asset related to additional tax basis |  |  | 116,000 |  |
Uncertain tax positions | $ 0 |  | $ 0 |  |
Percentage of tax benefits due to equity owners | 85.00% |  | 85.00% |  |
Percentage of tax benefits expected to be realized | 15.00% |  | 15.00% |  |
Consolidated Entity, Ownership By Parent, LLC Units Acquired |  |  | 33,195 |  |
Establishment of liabilities under tax receivable agreement |  | $ 20,027,000 | $ 414,000 | $ 20,027,000 |
Tax receivable agreement payments to related parties | $ 0 | $ 0 | 6,643,000 | $ 707,000 |
Liabilities under tax receivable agreement | 228,197,000 |  | 228,197,000 |  | $ 234,426,000
Current portion of liabilities under tax receivable agreement | 0 |  | 0 |  | $ 7,777,000
Foreign Tax Credit |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred tax assets, valuation allowance | 1,221,000 |  | $ 1,221,000 |  |
Limited Liability Company |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Units acquired during the period (in shares) |  |  | 213,263 |  |
Deferred tax asset, investment in partnership | $ 175,320,000 |  | $ 175,320,000 |  |

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