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BUSINESS COMBINATIONS - Narrative (Details) - USD ($) $ in Thousands |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 28, 2021 | Mar. 30, 2021 | Mar. 29, 2021 | Mar. 03, 2021 | Dec. 31, 2020 | Aug. 06, 2020 | Jan. 03, 2020 | Jun. 26, 2021 | Jun. 27, 2020 | Jun. 26, 2021 | Jun. 27, 2020 | Dec. 26, 2020
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 2,540,067 |  | $ 2,540,067 |  | $ 1,809,168
Vigene Biosciences, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  |  |  |  |  | 2,500 |  | 2,500 |  |
Vigene Biosciences, Inc. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price | $ 292,500 |  |  |  |  |  |  |  |  |  |  |
Consideration contingent upon future performance | $ 57,500 |  |  |  |  |  |  |  |  |  |  |
Retrogenix Limited |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  | $ 53,100 |  |  |  |  |  |  |  |  |  |
Consideration contingent upon future performance |  | 6,900 |  |  |  |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  |  |  |  |  | 900 |  | 1,700 |  |
Cash acquired |  | 8,500 |  |  |  |  |  |  |  |  |  |
Goodwill |  | 33,625 |  |  |  |  |  |  |  |  |  |
Definite-lived intangible assets |  | $ 22,126 |  |  |  |  |  |  |  |  |  |
Weighted-average amortization life |  | 11 years |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  | $ 400 |  |  |  |  |  |  |  |  |  |
Cognate BioServices, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 876,100 |  |  |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  |  |  |  |  | 11,200 |  | 18,400 |  |
Cash acquired |  |  | 70,500 |  |  |  |  |  |  |  |  |
Value of consideration not acquired |  |  | $ 15,700 |  |  |  |  |  |  |  |  |
Ownership percentage not acquired |  |  | 2.00% |  |  |  |  |  |  |  |  |
Revenue from acquiree included in operating results |  |  |  |  |  |  |  | 34,800 |  |  |  |
Operating income from acquiree included in operating results |  |  |  |  |  |  |  | 1,100 |  |  |  |
Goodwill |  |  | $ 603,379 |  |  |  |  |  |  |  |  |
Definite-lived intangible assets |  |  | $ 266,700 |  |  |  |  |  |  |  |  |
Weighted-average amortization life |  |  | 13 years |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | $ 52,082 |  |  |  |  |  |  |  |  |
Distributed Bio, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | $ 97,000 |  |  |  |  |  |  |
Consideration contingent upon future performance |  |  |  |  | 21,000 |  |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  |  |  |  |  | 200 |  | 900 |  |
Cash acquired |  |  |  |  | 800 |  |  |  |  |  |  |
Cash portion of consideration transferred |  |  |  |  | 80,800 |  |  |  |  |  |  |
Payments to settle promissory note |  |  |  |  | 3,000 |  |  |  |  |  |  |
Contingent consideration liability |  |  |  |  | 14,000 |  |  |  |  |  |  |
Goodwill |  |  |  |  | 71,585 |  |  |  |  |  |  |
Definite-lived intangible assets |  |  |  |  | $ 24,540 |  |  |  |  |  |  |
Weighted-average amortization life |  |  |  |  | 7 years |  |  |  |  |  |  |
Property, plant and equipment |  |  |  |  | $ 2,382 |  |  |  |  |  |  |
Cellero, LLC |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  | $ 36,900 |  |  |  |  |  |
Integration related costs and transaction costs |  |  |  |  |  |  |  | 200 |  | 600 |  |
Cash acquired |  |  |  |  |  | 500 |  |  |  |  |  |
Goodwill, amount expected to be deductible for tax purposes |  |  |  |  |  | 10,800 |  |  |  |  |  |
Goodwill |  |  |  |  |  | 19,457 |  |  |  |  |  |
Definite-lived intangible assets |  |  |  |  |  | $ 16,230 |  |  |  |  |  |
Weighted-average amortization life |  |  |  |  |  | 12 years |  |  |  |  |  |
Property, plant and equipment |  |  |  |  |  | $ 1,648 |  |  |  |  |  |
HemaCare Corporation |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  | $ 376,700 |  |  |  |  |
Integration related costs and transaction costs |  |  |  |  |  |  |  | $ 300 | $ 100 | 400 | $ 5,800 |
Cash acquired |  |  |  |  |  |  | 3,100 |  |  |  |  |
Goodwill |  |  |  |  |  |  | 210,196 |  |  |  |  |
Definite-lived intangible assets |  |  |  |  |  |  | $ 183,540 |  |  |  |  |
Weighted-average amortization life |  |  |  |  |  |  | 18 years |  |  |  |  |
Property, plant and equipment |  |  |  |  |  |  | $ 10,033 |  |  |  |  |
Other Acquisitions |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | $ 35,400 |  |  |  |  |  |  |  |
Consideration contingent upon future performance |  |  |  | 17,500 |  |  |  |  |  |  |  |
Cash portion of consideration transferred |  |  |  | 19,500 |  |  |  |  |  |  |  | $ 5,500
Contingent consideration liability |  |  |  | $ 15,900 |  |  |  |  |  |  |  |
Future performance period |  |  |  | 3 years |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 17,300 |  |  |  |  |  |  |  |
Definite-lived intangible assets |  |  |  | 15,200 |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | $ 3,000 |  |  |  |  |  |  |  |
Other Acquisitions | Supplier Relationships |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average amortization life |  |  |  | 4 years |  |  |  |  |  |  |  |
Depreciation and Amortization Expense | Cognate BioServices, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  |  |  | 9,500 | 10,200 |
Depreciation and Amortization Expense | HemaCare Corporation |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  |  |  |  | 400 |
Interest Expense | Cognate BioServices, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Adjustments related to prior period |  |  |  |  |  |  |  |  |  | $ 2,200 | $ 4,100 |

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