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INCOME TAXES- Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 26, 2018 | Dec. 27, 2017
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Income Tax Disclosure [Abstract] |  |
Deferred Tax Asset, Valuation Allowance, Other | $ 733 |
Deferred Tax Asset, Valuation Allowance, Tax Credit | (6,192) |
Deferred tax assets: |  |
Investment in partnership | 168,451 | $ 137,449
Tax Receivable Agreement | 57,203 | 43,464
Deferred rent | 1,109 | 571
Deferred revenue | 184 | 59
Stock-based compensation | 375 | 322
Net operating loss carryforwards | 18,046 | 12,332
Tax credits | 5,194 | 2,328
Other assets | 331 | 176
Total gross deferred tax assets | 250,893 | 196,701
Valuation allowance | (6,925) | (10,114)
Total deferred tax assets, net of valuation allowance | 243,968 | 186,587
Deferred tax liabilities: |  |
Property and equipment | (1,435) | (673)
Total gross deferred tax liabilities | (1,435) | (673)
Net deferred tax assets | $ 242,533 | $ 185,914

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