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NON-CONTROLLING INTERESTS - Narrative (Details) - shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 27, 2017 | Sep. 28, 2016 | Sep. 27, 2017 | Sep. 28, 2016
Noncontrolling Interest [Line Items] |  |  |  |
Non-controlling interest holders' weighted average ownership percentage | 29.10% | 33.90% | 29.70% | 38.50%
Units acquired during the period (in shares) |  |  | 1,009,727 |
Number of units redeemed (in shares) |  |  | 685,800 | 4,706,663
Redemption or Exchange of Units |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Units acquired during the period (in shares) |  |  | 685,800 | 4,706,663
Employee Stock Option |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Units acquired during the period (in shares) |  |  | 323,927 | 101,837

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