OTHER INTANGIBLE ASSETS, NET

12 Months Ended

Dec. 31, 2016

Intangible Assets, Net (Excluding Goodwill) [Abstract]

OTHER INTANGIBLE ASSETS, NET

. OTHER INTANGIBLE ASSETS, NET

Intangible assets are generally the result of acquisitions and consist primarily of purchased technology, customer related intangibles, and trademarks. Intangible assets are amortized over useful lives that generally range between 1 and 20 years.

The following tables present the cumulative composition of the Corporation’s intangible assets as of December 31, 2016 and December 31, 2015, respectively.

	2016							2015
(In thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Technology	$	166,859	$	(98,266	)	$	68,593	$	171,382	$	(91,430	)	$	79,952
Customer related intangibles	349,742		(157,154		)	192,588		357,538		(140,816		)	216,722
Other intangible assets	36,709		(26,429		)	10,280		37,200		(23,111		)	14,089
Total	$	553,310	$	(281,849	)	$	271,461	$	566,120	$	(255,357	)	$	310,763

Amortization expense from continuing operations for the years ended December 31, 2016, 2015, and 2014 was $33.4 million, $34.8 million, and $38.3 million, respectively. The estimated future amortization expense of intangible assets over the next five years is as follows:

(In thousands)
2017	$	32,178
2018	31,100
2019	29,340
2020	27,470
2021	25,759