INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
INTANGIBLE ASSETS [Abstract]
Goodwill	$ 441,361	$ 439,811
Identifiable intangible assets [Abstract]
Gross Carrying Amount	257,495	250,099
Accumulated Amortization	129,422	102,615
Amortization of identifiable finite-lived intangible assets [Abstract]
Amortization of identifiable intangible assets	26,784	29,768	$ 26,467
Finite-lived intangible assets, future amortization expense [Abstract]
2018	24,593
2019	22,479
2020	20,442
2021	17,234
2022	15,776
Indefinite-lived intangible assets	$ 0	0
Customer Relationships & Lists [Member]
Identifiable intangible assets [Abstract]
Amortization Period	10 years
Gross Carrying Amount	$ 190,061	185,885
Accumulated Amortization	105,573	86,338
Trademarks & Trade Names [Member]
Identifiable intangible assets [Abstract]
Gross Carrying Amount	40,630	39,241
Accumulated Amortization	$ 12,895	9,260
Trademarks & Trade Names [Member] | Minimum [Member]
Identifiable intangible assets [Abstract]
Amortization Period	5 years
Trademarks & Trade Names [Member] | Maximum [Member]
Identifiable intangible assets [Abstract]
Amortization Period	17 years
Developed Technology [Member]
Identifiable intangible assets [Abstract]
Amortization Period	5 years
Gross Carrying Amount	$ 13,338	12,260
Accumulated Amortization	5,936	3,358
Other [Member]
Identifiable intangible assets [Abstract]
Gross Carrying Amount	13,466	12,713
Accumulated Amortization	$ 5,018	$ 3,659
Other [Member] | Minimum [Member]
Identifiable intangible assets [Abstract]
Amortization Period	3 years
Other [Member] | Maximum [Member]
Identifiable intangible assets [Abstract]
Amortization Period	18 years