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BUSINESS COMBINATIONS - Purchase Price Allocation (Details) - USD ($) $ in Thousands | Jun. 27, 2020 | Jan. 03, 2020 | Dec. 28, 2019 | Aug. 28, 2019 | Apr. 29, 2019
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Business Acquisition [Line Items] |  |  |  |  |
Goodwill | $ 1,735,641 |  | $ 1,540,565 |  |
HemaCare Corporation |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Trade receivables |  | $ 6,451 |  |  |
Inventories |  | 8,468 |  |  |
Other current assets (excluding cash) |  | 3,527 |  |  |
Property, plant and equipment |  | 10,033 |  |  |
Goodwill |  | 209,104 |  |  |
Definite-lived intangible assets |  | 183,540 |  |  |
Other long-term assets |  | 5,920 |  |  |
Current liabilities |  | (5,188) |  |  |
Deferred tax liabilities |  | (37,470) |  |  |
Other long-term liabilities |  | (7,664) |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total |  | $ 376,721 |  |  |
Citoxlab |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Trade receivables |  |  |  |  | $ 35,405
Inventories |  |  |  |  | 5,282
Other current assets (excluding cash) |  |  |  |  | 13,917
Property, plant and equipment |  |  |  |  | 88,605
Goodwill |  |  |  |  | 280,161
Definite-lived intangible assets |  |  |  |  | 162,400
Other long-term assets |  |  |  |  | 20,063
Deferred revenue |  |  |  |  | (15,278)
Current liabilities |  |  |  |  | (46,081)
Deferred tax liabilities |  |  |  |  | (27,458)
Other long-term liabilities |  |  |  |  | (22,624)
Redeemable noncontrolling interest |  |  |  |  | (4,035)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total |  |  |  |  | $ 490,357
Other Acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Trade receivables |  |  |  | $ 189 |
Inventories |  |  |  | 7,644 |
Property, plant and equipment |  |  |  | 1,462 |
Goodwill |  |  |  | 12,591 |
Other long-term assets |  |  |  | 11,849 |
Current liabilities |  |  |  | (441) |
Deferred tax liabilities |  |  |  | (1,253) |
Other long-term liabilities |  |  |  | (238) |
Redeemable noncontrolling interest |  |  |  | (8,740) |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total |  |  |  | $ 23,063 |

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