INTANGIBLE ASSETS, Identifiable Intangible Assets with Finite Lives (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Identifiable intangible assets [Abstract]
Gross carrying amount	$ 257,290	$ 250,099
Accumulated amortization	122,779	102,615
Amortization of identifiable finite-lived intangible assets [Abstract]
Amortization of identifiable intangible assets	20,145
Finite-lived intangible assets, future amortization expense [Abstract]
Remainder of 2017	6,910
2018	24,575
2019	22,460
2020	20,440
2021	17,215
2022	15,675
Indefinite-lived intangible assets	$ 0
Customer Relationships & Lists [Member]
Identifiable intangible assets [Abstract]
Amortization period	10 years
Gross carrying amount	$ 190,044	185,885
Accumulated amortization	$ 100,868	86,338
Trademarks & Trade Names [Member]
Identifiable intangible assets [Abstract]
Amortization period	17 years
Gross carrying amount	$ 40,630	39,241
Accumulated amortization	$ 11,978	9,260
Developed Technology [Member]
Identifiable intangible assets [Abstract]
Amortization period	5 years
Gross carrying amount	$ 13,338	12,260
Accumulated amortization	5,269	3,358
Other [Member]
Identifiable intangible assets [Abstract]
Gross carrying amount	13,278	12,713
Accumulated amortization	$ 4,664	$ 3,659
Other [Member] | Minimum [Member]
Identifiable intangible assets [Abstract]
Amortization period	5 years
Other [Member] | Maximum [Member]
Identifiable intangible assets [Abstract]
Amortization period	17 years