FAIR VALUE MEASUREMENTS (Narrative) (Details) - Discount rate	Dec. 31, 2021	Apr. 02, 2021
PolSource
Business Acquisition, Contingent Consideration [Line Items]
Measurement input to determine fair value of contingent consideration		0.004
CORE
Business Acquisition, Contingent Consideration [Line Items]
Measurement input to determine fair value of contingent consideration	0.130
Minimum | Other 2021 Acquisitions
Business Acquisition, Contingent Consideration [Line Items]
Measurement input to determine fair value of contingent consideration	0.150
Minimum | 2020 Acquisitions
Business Acquisition, Contingent Consideration [Line Items]
Measurement input to determine fair value of contingent consideration	0.155
Maximum | Other 2021 Acquisitions
Business Acquisition, Contingent Consideration [Line Items]
Measurement input to determine fair value of contingent consideration	0.220
Maximum | 2020 Acquisitions
Business Acquisition, Contingent Consideration [Line Items]
Measurement input to determine fair value of contingent consideration	0.175