INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
INTANGIBLE ASSETS [Abstract]
Goodwill	$ 439,811	$ 383,906
Identifiable intangible assets [Abstract]
Gross Carrying Amount	250,099	207,758
Accumulated Amortization	102,615	72,847
Amortization of identifiable finite-lived intangible assets [Abstract]
Amortization of identifiable intangible assets	29,768	26,467	$ 19,468
Finite-lived intangible assets, future amortization expense [Abstract]
2017	26,160
2018	23,641
2019	21,604
2020	19,634
2021	16,472
Indefinite-lived intangible assets	$ 0	0
Customer Relationships and Lists [Member]
Identifiable intangible assets [Abstract]
Amortization Period	10 years
Gross Carrying Amount	$ 185,885	167,442
Accumulated Amortization	$ 86,338	63,578
Trademarks & Trade Names [Member]
Identifiable intangible assets [Abstract]
Amortization Period	17 years
Gross Carrying Amount	$ 39,241	32,014
Accumulated Amortization	$ 9,260	5,704
Developed Technology [Member]
Identifiable intangible assets [Abstract]
Amortization Period	5 years
Gross Carrying Amount	$ 12,260	3,200
Accumulated Amortization	3,358	1,057
Other [Member]
Identifiable intangible assets [Abstract]
Gross Carrying Amount	12,713	5,102
Accumulated Amortization	$ 3,659	$ 2,508
Other [Member] | Minimum [Member]
Identifiable intangible assets [Abstract]
Amortization Period	5 years
Other [Member] | Maximum [Member]
Identifiable intangible assets [Abstract]
Amortization Period	17 years