Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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ACQUISITION AND RELATED PARTY ITEMS - Intangible Assets Acquired, Amortization Method (Details) - USD ($) $ in Thousands			9 Months Ended
	Apr. 01, 2020	Dec. 05, 2019	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Gross Carrying Amount			$ 61,896	$ 14,517
Scil Animal Care Company
Business Acquisition [Line Items]
Gross Carrying Amount	$ 44,517
Scil Animal Care Company \| Trade names
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 7,556
CVM
Business Acquisition [Line Items]
Gross Carrying Amount			2,608
CVM \| Developed technology
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired			$ 57
Customer relationships \| Scil Animal Care Company
Business Acquisition [Line Items]
Useful Life	10 years
Finite-lived intangible assets acquired	$ 36,272
Customer relationships \| CVM
Business Acquisition [Line Items]
Useful Life		6 years
Finite-lived intangible assets acquired		$ 2,440
Internally developed software \| Scil Animal Care Company
Business Acquisition [Line Items]
Useful Life	7 years
Finite-lived intangible assets acquired	$ 353
Backlog \| Scil Animal Care Company
Business Acquisition [Line Items]
Useful Life	2 months 12 days
Finite-lived intangible assets acquired	$ 210
Non-compete agreements \| Scil Animal Care Company
Business Acquisition [Line Items]
Useful Life	2 years
Finite-lived intangible assets acquired	$ 60
Trade names \| Scil Animal Care Company
Business Acquisition [Line Items]
Useful Life	9 months 18 days
Finite-lived intangible assets acquired	$ 66
Trade names \| CVM
Business Acquisition [Line Items]
Useful Life		4 years
Finite-lived intangible assets acquired		$ 111