INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
INTANGIBLE ASSETS [Abstract]
Goodwill	$ 441,554	$ 441,361
Identifiable intangible assets [Abstract]
Gross carrying amount	257,749	257,495
Accumulated amortization	141,876	129,422
Amortization of identifiable finite-lived intangible assets [Abstract]
Amortization of identifiable intangible assets	12,472
Finite-lived intangible assets, future amortization expense [Abstract]
Remainder of 2018	12,282
2019	22,652
2020	20,618
2021	17,411
2022	15,843
2023	14,522
Indefinite-lived intangible assets	$ 0
Customer Relationships & Lists [Member]
Identifiable intangible assets [Abstract]
Amortization period	10 years
Gross carrying amount	$ 190,032	190,061
Accumulated amortization	114,007	105,573
Trademarks & Trade Names [Member]
Identifiable intangible assets [Abstract]
Gross carrying amount	40,630	40,630
Accumulated amortization	$ 14,894	12,895
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	13,338
Accumulated amortization	7,270	5,936
Other [Member]
Identifiable intangible assets [Abstract]
Gross carrying amount	13,749	13,466
Accumulated amortization	$ 5,705	$ 5,018
Other [Member] | Minimum [Member]
Identifiable intangible assets [Abstract]
Amortization period	3 years
Other [Member] | Maximum [Member]
Identifiable intangible assets [Abstract]
Amortization period	18 years