INTANGIBLE ASSETS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 523,949,000	$ 529,463,000	$ 523,998,000
Identifiable intangible assets [Abstract]
Gross Carrying Amount	327,330,000	330,063,000
Accumulated Amortization	232,665,000	208,403,000
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Amortization of identifiable intangible assets	25,092,000	27,811,000	$ 25,789,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2022	23,641,000
2023	19,566,000
2024	10,682,000
2025	6,413,000
2026	5,083,000
Identifiable intangible assets	0	0
Customer relationships and lists
Identifiable intangible assets [Abstract]
Gross Carrying Amount	240,059,000	243,557,000
Accumulated Amortization	$ 173,489,000	158,051,000
Customer relationships and lists | Minimum
Identifiable intangible assets [Abstract]
Amortization Period	10 years
Customer relationships and lists | Maximum
Identifiable intangible assets [Abstract]
Amortization Period	20 years
Trademarks & trade names
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 43,116,000	43,208,000
Accumulated Amortization	$ 28,985,000	24,974,000
Trademarks & trade names | Minimum
Identifiable intangible assets [Abstract]
Amortization Period	2 years
Trademarks & trade names | Maximum
Identifiable intangible assets [Abstract]
Amortization Period	17 years
Developed technology
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 20,234,000	21,674,000
Accumulated Amortization	$ 14,607,000	13,693,000
Developed technology | Minimum
Identifiable intangible assets [Abstract]
Amortization Period	5 years
Developed technology | Maximum
Identifiable intangible assets [Abstract]
Amortization Period	12 years
Other
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 23,921,000	21,624,000
Accumulated Amortization	$ 15,584,000	$ 11,685,000
Other | Minimum
Identifiable intangible assets [Abstract]
Amortization Period	2 years
Other | Maximum
Identifiable intangible assets [Abstract]
Amortization Period	18 years