GOODWILL AND INTANGIBLE ASSETS

Goodwill activity for each of the Company's two reportable segments, Critical Materials Handling (CMH) and Electronic Materials (EM), was as follows:



(In thousands)	CMH			EM			Total
December 31, 2012	$	2,209		$	—		$	2,209
Addition due to acquisition	10,090			—			10,090
Other, including foreign currency translation	(25		)	—			(25		)
December 31, 2013	12,274			—			12,274
Addition due to acquisition	35,329			296,795			332,124
Other, including foreign currency translation	(120		)	(3,535		)	(3,655		)
December 31, 2014	$	47,483		$	293,260		$	340,743

As of December 31, 2014, goodwill amounted to approximately $340.7 million, an increase of $328.5 million from the balance at December 31, 2013. The increase in goodwill relates to the acquisition of ATMI completed in April 2014 as described in note 2 and is provisional subject to the Company's final valuation of assets acquired and liabilities assumed. The increase was partially offset by the foreign currency translation adjustments.

Identifiable intangible assets at December 31, 2014 and 2013 consist of the following:



2014
(In thousands)	Gross carrying Amount		Accumulated amortization		Net carrying value		Weighted average life in years
Patents	$	1,347	$	779	$	568	9.8
Developed technology	199,402		78,785		120,617		6.6
Trademarks and trade names	17,152		8,883		8,269		9.8
Customer relationships	220,420		54,452		165,968		10.3
Other	16,768		3,636		13,132		6.6
	$	455,089	$	146,535	$	308,554	8.5



2013
(In thousands)	Gross carrying amount		Accumulated amortization		Net carrying value		Weighted average life in years
Patents	$	1,369	$	649	$	720	9.8
Developed technology	78,686		62,257		16,429		7.4
Trademarks and trade names	13,092		7,306		5,786		12.0
Customer relationships	57,617		39,146		18,471		11.0
Other	2,213		110		2,103		13.3
	$	152,977	$	109,468	$	43,509	9.3

The table below sets forth the amortization expense for the years ended December 31, 2014, 2013, and 2012:



(In thousands)	2014		2013		2012
Amortization expense	$	37,067	$	9,347	$	9,594

The amortization expense for each of the five succeeding years and thereafter relating to intangible assets currently recorded in the Company's consolidated balance sheets is estimated to be the following at December 31, 2014:




Fiscal year ending December 31	(In thousands)
2015	$	47,835
2016	45,401
2017	43,977
2018	42,725
2019	40,472
Thereafter	88,144
	$	308,554