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OTHER INTANGIBLE ASSETS, NET
 3 Months Ended
Mar. 31, 2016
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
OTHER INTANGIBLE ASSETS, NET
OTHER INTANGIBLE ASSETS, NET

The following tables present the cumulative composition of the Corporation’s intangible assets:
(In thousands)
 
March 31, 2016
 
December 31, 2015
 
 
Gross
 
Accumulated Amortization
 
Net
 
Gross
 
Accumulated Amortization
 
Net
Technology
 
$
172,959

 
$
(94,475
)
 
$
78,484

 
$
171,382

 
$
(91,430
)
 
$
79,952

Customer related intangibles
 
359,734

 
(146,920
)
 
212,814

 
357,538

 
(140,816
)
 
216,722

Other intangible assets
 
37,522

 
(22,817
)
 
14,705

 
37,200

 
(23,111
)
 
14,089

Total
 
$
570,215

 
$
(264,212
)
 
$
306,003

 
$
566,120

 
$
(255,357
)
 
$
310,763



Total intangible amortization expense for the three months ended March 31, 2016 was $8.4 million as compared to $8.6 million in the comparable prior year period.  The estimated amortization expense for the five years ending December 31, 2016 through 2020 is $33.8 million, $33.2 million, $32.2 million, $30.4 million, and $28.4 million, respectively.