BUSINESS COMBINATIONS AND ASSET ACQUISITIONS - Schedule of Assets Acquired and Liabilities Assumed From Paradigm Diagnostics Acquisition (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Mar. 03, 2021	Dec. 31, 2020	Mar. 03, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 2,242,535		$ 1,237,672		$ 1,203,197
Fair Value, Adjustment Disclosure [Abstract]
Net operating assets	0
Goodwill	1,862
Developed technology	0
Net operating liabilities	$ 1,862
Paradigm & Viomics
Business Acquisition [Line Items]
Net operating assets		$ 5,373		$ 6,133
Goodwill		30,431		29,695
Developed technology		7,800		7,800
Net operating liabilities		(3,203)		(3,123)
Net assets acquired		40,401		$ 40,505
Fair Value, Adjustment Disclosure [Abstract]
Net operating assets		(760)
Goodwill		736
Developed technology		0
Net operating liabilities		(80)
Total purchase price		$ (104)