Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill activity for each of the Company’s reportable segments that carry goodwill, Specialty Chemicals and Engineered Materials (SCEM), Microcontamination Control (MC) and Advanced Materials Handling (AMH), for the years ended December 31, 2018 and 2017 is shown below:



(In thousands)	SCEM			MC			AMH		Total
December 31, 2016	$	297,858		$	—		$	47,411	$	345,269
Purchase accounting adjustments	—			8,007			—		8,007
Other, including foreign currency translation	6,412			—			—		6,412
December 31, 2017	304,270			8,007			47,411		359,688
Addition due to acquisitions	—			183,729			9,660		193,389
Other, including foreign currency translation	(2,847		)	(28		)	—		(2,875		)
December 31, 2018	$	301,423		$	191,708		$	57,071	$	550,202

Schedule of Acquired Finite-Lived Intangible Assets by Major Class

Identifiable intangible assets at December 31, 2018 and 2017 consist of the following:



2018
(In thousands)	Gross carrying Amount		Accumulated amortization		Net carrying value		Weighted average life in years
Developed technology	248,776		176,421		72,355		7.0
Trademarks and trade names	25,643		14,749		10,894		10.5
Customer relationships	328,050		133,068		194,982		10.8
Other	36,306		18,850		17,456		4.1
	$	638,775	$	343,088	$	295,687	8.9



2017
(In thousands)	Gross carrying amount		Accumulated amortization		Net carrying value		Weighted average life in years
Developed technology	206,224		149,215		57,009		6.6
Trademarks and trade names	16,807		13,712		3,095		9.9
Customer relationships	220,806		110,281		110,525		10.3
Other	20,032		8,231		11,801		6.7
	$	463,869	$	281,439	$	182,430	8.5

Amortization of Intangibles

The table below sets forth the amortization expense for the years ended December 31, 2018, 2017, and 2016:



(In thousands)	2018		2017		2016
Amortization expense	$	62,152	$	44,023	$	44,263

Estimated Future Amortization Expense



(In thousands)	2019		2020		2021		2022		2023		Thereafter		Total
Future amortization expense	$	63,444	$	42,229	$	35,771	$	35,189	$	34,500	$	84,554	$	295,687