GOODWILL AND OTHER INTANGIBLE ASSETS (Summary of Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Amortized intangible assets:
Gross Carrying Amount	$ 143,495		$ 143,495		$ 146,103
Accumulated Amortization	(54,735)		(54,735)		(50,643)
Net Value	88,760		88,760		95,460
Aggregate amortization expense	2,754	$ 2,506	5,573	$ 4,935
Future estimated amortization expense
2018	5,676		5,676
2019	11,026		11,026
2020	9,901		9,901
2021	9,715		9,715
2022 and thereafter	52,442		$ 52,442
Weighted Average
Amortized intangible assets:
Amortization Period			11 years 7 months 6 days
Patents
Amortized intangible assets:
Gross Carrying Amount	7,689		$ 7,689		7,819
Accumulated Amortization	(7,570)		(7,570)		(7,806)
Net Value	119		$ 119		13
Patents | Weighted Average
Amortized intangible assets:
Amortization Period			3 months 18 days
Technology
Amortized intangible assets:
Gross Carrying Amount	46,254		$ 46,254		47,571
Accumulated Amortization	(15,765)		(15,765)		(14,624)
Net Value	30,489		$ 30,489		32,947
Technology | Weighted Average
Amortized intangible assets:
Amortization Period			15 years
Customer relationships
Amortized intangible assets:
Gross Carrying Amount	67,560		$ 67,560		68,886
Accumulated Amortization	(16,063)		(16,063)		(13,401)
Net Value	51,497		$ 51,497		55,485
Customer relationships | Weighted Average
Amortized intangible assets:
Amortization Period			11 years 10 months 24 days
License agreements and other
Amortized intangible assets:
Gross Carrying Amount	21,992		$ 21,992		21,827
Accumulated Amortization	(15,337)		(15,337)		(14,812)
Net Value	$ 6,655		$ 6,655		$ 7,015
License agreements and other | Weighted Average
Amortized intangible assets:
Amortization Period			7 years 6 months