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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The amount of identifiable intangible assets recognized as of the acquisition date.

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ACQUISITIONS - Schedule of identifiable intangible assets acquired (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020
2021 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets	$ 147,495
2020 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets		$ 130,981
Trademarks \| 2021 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets	$ 38,337
Trademarks \| 2020 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets		23,464
Customer relationships
Business Acquisition [Line Items]
Estimated Useful Life (in years)	10 years
Customer relationships \| 2021 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets	$ 92,453
Customer relationships \| 2020 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets		99,897
Non-compete agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	5 years
Non-compete agreements \| 2021 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets	$ 3,255
Non-compete agreements \| 2020 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets		1,150
Patents \| Minimum
Business Acquisition [Line Items]
Estimated Useful Life (in years)	10 years
Patents \| Maximum
Business Acquisition [Line Items]
Estimated Useful Life (in years)	18 years
Patents \| 2021 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets	$ 13,450
Patents \| 2020 Acquisitions
Business Acquisition [Line Items]
Identifiable intangible assets		$ 6,470