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Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Other Than Goodwill

Intangible assets, net, other than goodwill, at September 30, 2019 and December 31, 2018 are summarized as follows:

			2019																														2018
(in thousands)			Gross (a)						Accumulated Amortization						Net						Gross (a)						Accumulated Amortization						Net						Weighted Average Useful Life Remaining (in years)
Intangible assets with finite lives:
Customer relationships			$	102,023					$	(74,349)					$	27,674					$	103,332					$	(67,129)					$	36,203					5
Acquired technology			54,067						(51,241)						2,826						52,691						(47,546)						5,145						2
Trade names			23,668						(18,402)						5,266						25,096						(17,669)						7,427						5
Patent costs			11,678						(9,079)						2,599						11,032						(8,382)						2,650						14
Trade secrets			19,296						(15,076)						4,220						19,374						(13,574)						5,800						3
Acquired patents			16,184						(14,340)						1,844						16,212						(13,160)						3,052						7
Other			25,712						(18,888)						6,824						26,551						(18,553)						7,998						1
Total intangible assets			$	252,628					$	(201,375)					$	51,253					$	254,288					$	(186,013)					$	68,275					5

^(a) Change in gross carrying amounts consists primarily of charges for license and patent costs and foreign currency translation.

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Schedule of Finite And Indefinite-Lived Intangible Assets [Table Text Block]

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