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Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Other Than Goodwill

Intangible assets, net, other than goodwill, at December 31, 2019 and 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			$	103,661					$	(77,021)					$	26,640					$	103,332					$	(67,129)					$	36,203					4
Acquired technology			54,378						(51,875)						2,503						52,691						(47,546)						5,145						1
Trade names			23,907						(19,133)						4,774						25,096						(17,669)						7,427						4
Patent costs			11,760						(9,535)						2,225						11,032						(8,382)						2,650						15
Trade secrets			19,494						(15,714)						3,780						19,374						(13,574)						5,800						2
Acquired patents			16,215						(14,706)						1,509						16,212						(13,160)						3,052						7
Other			26,256						(19,349)						6,907						26,551						(18,553)						7,998						1
Total intangible assets			$	255,671					$	(207,333)					$	48,338					$	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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