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EQUITY AND NONCONTROLLING INTERESTS - Rollforward of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Aug. 28, 2019 | Jun. 13, 2019 | Apr. 29, 2019
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |
Beginning balance | $ 18,525 | $ 16,609 |  |  |
Modification of Vital River 8% purchase option |  |  |  |  |
Adjustment to Vital River redemption value | 1,451 | 1,111 |  |  |
Purchase of Vital River 5% equity interest | (8,745) | 0 |  |  |
Change in fair value of Vital River 8% equity interest, included in additional-paid-in-capital | 2,708 | 0 |  |  |
Modification of Vital River 8% purchase option | 2,196 | 0 |  |  |
Net income attributable to noncontrolling interests | 249 | 543 |  |  |
Foreign currency translation | (814) | (932) |  |  |
Ending balance | 28,345 | 17,331 |  |  |
Vital River |  |  |  |  |
Modification of Vital River 8% purchase option |  |  |  |  |
Additional equity interest percentage purchased |  |  |  | 5.00% |
Noncontrolling interest ownership percentage |  |  |  | 8.00% |
Citoxlab |  |  |  |  |
Modification of Vital River 8% purchase option |  |  |  |  |
Acquisition of non-controlling interest | 4,035 | 0 |  |  |
Noncontrolling interest ownership percentage |  |  |  |  | 10.00%
Supplier |  |  |  |  |
Modification of Vital River 8% purchase option |  |  |  |  |
Acquisition of non-controlling interest | $ 8,740 | $ 0 |  |  |
Noncontrolling interest ownership percentage |  |  | 20.00% |  | 20.00%

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