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GOODWILL AND INTANGIBLE ASSETS
12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS
 GOODWILL AND INTANGIBLE ASSETS

The changes in goodwill included in the core banking segment during the years ended December 31, 2015 and 2014 were as follows (in thousands):
 
 
2015
 
2014
Beginning of year
 
$
21,824

 
$
21,824

Acquired goodwill
 

 

End of year
 
$
21,824

 
$
21,824



Acquired intangible assets were as follows at December 31, 2015 and 2014 (in thousands):
 
At December 31, 2015
 
At December 31, 2014
 
Balance Acquired
 
Accumulated Amortization
 
Balance Acquired
 
Accumulated Amortization
Core deposit intangibles
$
5,975

 
$
4,057

 
$
5,975

 
$
3,279

Other customer relationship intangibles
5,633

 
3,620

 
5,633

 
3,262

Total
$
11,608

 
$
7,677

 
$
11,608

 
$
6,541



Aggregate amortization expense was $1.1 million, $1.3 million, and $0.9 million for 2015, 2014 and 2013, respectively.

The remaining estimated aggregate amortization expense at December 31, 2015 is listed below (in thousands):

Year
 
Estimated Expense
2016
 
$
986

2017
 
859

2018
 
734

2019
 
609

2020
 
484

2021 and thereafter
 
259

Total
 
$
3,931