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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Goodwill and other intangible assets by reportable segment consisted of the following:
 
At December 31,
 
2017
 
2016
(In thousands)
Gross Carrying
Amount
Accumulated
Amortization
Net Carrying
Amount
 
Gross Carrying
Amount
Accumulated
Amortization
Net Carrying
Amount
Goodwill:
 
 
 
 
 
 
 
Community Banking
$
516,560

 
$
516,560

 
$
516,560

 
$
516,560

HSA Bank
21,813

 
21,813

 
21,813

 
21,813

Total goodwill
$
538,373

 
$
538,373

 
$
538,373

 
$
538,373

 
 
 
 
 
 
 
 
Other intangible assets:
 
 
 
 
 
 
 
HSA Bank - Core deposit intangible assets
$
22,000

$
(8,610
)
$
13,390

 
$
22,000

$
(6,162
)
$
15,838

HSA Bank - Customer relationships
21,000

(4,779
)
16,221

 
21,000

(3,164
)
17,836

Total other intangible assets
$
43,000

$
(13,389
)
$
29,611

 
$
43,000

$
(9,326
)
$
33,674


As of December 31, 2017, the remaining estimated aggregate future amortization expense for intangible assets is as follows:
(In thousands)
 
2018
$
3,847

2019
3,847

2020
3,847

2021
3,847

2022
3,847

Thereafter
10,376