INTANGIBLE ASSETS - Schedule of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 481,443	$ 479,235
Accumulated Amortization	303,918	288,023
Customer relationships & lists
Identifiable intangible assets [Abstract]
Gross Carrying Amount	363,563	362,032
Accumulated Amortization	$ 220,718	209,651
Customer relationships & lists | Minimum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	10 years
Customer relationships & lists | Maximum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	20 years
Trademarks & trade names
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 50,353	50,286
Accumulated Amortization	$ 40,225	37,773
Trademarks & trade names | Minimum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	2 years
Trademarks & trade names | Maximum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	17 years
Developed technology
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 41,396	41,184
Accumulated Amortization	$ 18,972	17,516
Developed technology | Minimum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	5 years
Developed technology | Maximum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	12 years
Other
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 26,131	25,733
Accumulated Amortization	$ 24,003	$ 23,083
Other | Minimum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	2 years
Other | Maximum
Identifiable intangible assets [Abstract]
Amortization Period (in years)	18 years