BUSINESS COMBINATIONS - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 25, 2021	Jun. 28, 2021	Mar. 30, 2021	Mar. 29, 2021	Dec. 31, 2020	Dec. 26, 2020	Aug. 06, 2020	Jan. 03, 2020
Business Acquisition [Line Items]
Goodwill	$ 2,736,322					$ 1,809,168
Vigene Biosciences, Inc.
Business Acquisition [Line Items]
Trade receivables		$ 3,548
Other current assets (excluding cash)		1,657
Property, plant and equipment		7,649
Operating lease right-of-use assets, net		22,507
Goodwill		242,822
Definite-lived intangible assets		93,600
Other long-term assets		694
Deferred revenue		(4,260)
Current liabilities		(6,319)
Operating lease right-of-use liabilities		(21,220)
Deferred tax liabilities		(14,600)
Total purchase price allocation		$ 326,078
Retrogenix Limited
Business Acquisition [Line Items]
Trade receivables			$ 2,266
Other current assets (excluding cash)			209
Property, plant and equipment			400
Goodwill			34,489
Definite-lived intangible assets			22,126
Other long-term assets			1,385
Current liabilities			(1,575)
Deferred tax liabilities			(4,174)
Other long-term liabilities			(1,205)
Total purchase price allocation			$ 53,921
Cognate BioServices, Inc.
Business Acquisition [Line Items]
Trade receivables				$ 18,566
Inventories				4,231
Other current assets (excluding cash)				10,601
Property, plant and equipment				52,082
Operating lease right-of-use assets, net				34,349
Goodwill				608,792
Definite-lived intangible assets				270,900
Other long-term assets				6,098
Deferred revenue				(18,582)
Current liabilities				(45,025)
Operating lease right-of-use liabilities				(31,383)
Deferred tax liabilities				(34,124)
Other long-term liabilities				(414)
Total purchase price allocation				$ 876,091
Distributed Bio, Inc.
Business Acquisition [Line Items]
Trade receivables					$ 2,722
Other current assets (excluding cash)					221
Property, plant and equipment					2,382
Goodwill					71,585
Definite-lived intangible assets					24,540
Other long-term assets					2,055
Current liabilities					(2,823)
Deferred tax liabilities					(2,529)
Other long-term liabilities					(1,123)
Total purchase price allocation					$ 97,030
Cellero, LLC
Business Acquisition [Line Items]
Trade receivables							$ 1,500
Inventories							551
Other current assets (excluding cash)							182
Property, plant and equipment							1,648
Goodwill							19,457
Definite-lived intangible assets							16,230
Other long-term assets							849
Current liabilities							(1,360)
Deferred tax liabilities							(1,467)
Other long-term liabilities							(740)
Total purchase price allocation							$ 36,850
HemaCare Corporation
Business Acquisition [Line Items]
Trade receivables								$ 6,451
Inventories								8,468
Other current assets (excluding cash)								3,494
Property, plant and equipment								10,033
Goodwill								210,196
Definite-lived intangible assets								183,540
Other long-term assets								5,920
Current liabilities								(5,188)
Deferred tax liabilities								(38,529)
Other long-term liabilities								(7,664)
Total purchase price allocation								$ 376,721