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NON-CONTROLLING INTERESTS NON-CONTROLLING INTERESTS - Redemption of LLC Interests (Details) - shares | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 25, 2020
Limited Liability Company |  |
Class of Stock [Line Items] |  |
Number of units redeemed (in shares) | 29,600 | 28,195
Redemptions by NCI Holders | Limited Liability Company |  |
Class of Stock [Line Items] |  |
Number of units redeemed (in shares) | 29,600 | 28,195
Common Stock [Member] | Class A Common Stock |  |
Class of Stock [Line Items] |  |
Shares of Class A common stock issued in connection with redemptions of LLC Interests | 29,600 | 28,195
Common Stock [Member] | Class B Common Stock |  |
Class of Stock [Line Items] |  |
Shares of Class A common stock issued in connection with redemptions of LLC Interests | 29,600 | 28,195
Shares of Class B common stock surrendered and canceled | 29,600 | 28,195

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