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NON-CONTROLLING INTERESTS - Narrative (Details) |  | 12 Months Ended
--- | --- | ---
Feb. 04, 2015 | Dec. 26, 2018 shares | Dec. 27, 2017 shares
Noncontrolling Interest [Line Items] |  |  |
Weighted average ownership percentage |  | 23.40% | 29.40%
Units acquired during the period (in shares) |  | 2,692,660 | 1,003,585
Ownership percent of noncontrolling interest |  | 79.60% | 72.10%
Class A Common Stock |  |  |
Noncontrolling Interest [Line Items] |  |  |
Ratio of common stock to limited liability company interest | 1 |  |
Limited Liability Company |  |  |
Noncontrolling Interest [Line Items] |  |  |
Units acquired during the period (in shares) |  | 2,993,356 |
Number of units redeemed (in shares) |  | 2,692,660 | 1,003,585
Stock options |  |  |
Noncontrolling Interest [Line Items] |  |  |
Units acquired during the period (in shares) |  | 300,696 | 372,508

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