GOODWILL AND INTANGIBLE ASSETS

Goodwill activity for each of the Company's two reportable segments, Critical Materials Handling (CMH) and Electronic Materials (EM), for the years ended December 31, 2015 and 2014 is shown below:



(In thousands)	CMH			EM			Total
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
Addition due to purchase accounting adjustments	—			4,972			4,972
Other, including foreign currency translation	(72		)	(3,532		)	(3,604		)
December 31, 2015	$	47,411		$	294,700		$	342,111

As of December 31, 2015, goodwill amounted to approximately $342.1 million, an increase of $1.4 million from the balance at December 31, 2014. The increase in goodwill in 2015 relates to the final purchase accounting adjustments related to the acquisition of ATMI completed in April 2014 as described in note 2. The increase was partially offset by the foreign currency translation adjustments.

Identifiable intangible assets at December 31, 2015 and 2014 consist of the following:



2015
(In thousands)	Gross carrying Amount		Accumulated amortization		Net carrying value		Weighted average life in years
Patents	$	1,315	$	900	$	415	9.8
Developed technology	199,377		101,983		97,394		6.6
Trademarks and trade names	17,085		10,905		6,180		9.8
Customer relationships	218,283		72,948		145,335		10.3
Other	16,766		7,148		9,618		6.6
	$	452,826	$	193,884	$	258,942	8.5



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

The table below sets forth the amortization expense for the years ended December 31, 2015, 2014, and 2013:



(In thousands)	2015		2014		2013
Amortization expense	$	47,349	$	37,067	$	9,347

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, 2015:




Fiscal year ending December 31	(In thousands)
2016	$	44,802
2017	43,936
2018	40,797
2019	38,557
2020	28,743
Thereafter	62,107
	$	258,942