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GOODWILL AND INTANGIBLE ASSETS
9 Months Ended
Sep. 30, 2017
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 periods ended September 30, 2017 and 2016 were as follows (in thousands):
 
 
2017
 
2016
Beginning of year
 
$
21,824

 
$
21,824

Acquired goodwill
 

 

Ending balance September 30,
 
$
21,824

 
$
21,824



Acquired intangible assets were as follows at September 30, 2017 and December 31, 2016 (in thousands):
 
 
At September 30, 2017
 
At December 31, 2016
 
 
Balance Acquired
 
Accumulated Amortization
 
Balance Acquired
 
Accumulated Amortization
Core deposit intangibles
 
$
5,975

 
$
5,077

 
$
5,975

 
$
4,689

Other customer relationship intangibles
 
5,633

 
4,239

 
5,633

 
3,974

Total
 
$
11,608

 
$
9,316

 
$
11,608

 
$
8,663



Aggregate amortization expense was $0.2 million for both of the three month periods ended September 30, 2017 and 2016. Aggregate amortization expense was $0.7 million for both of the nine month periods ended September 30, 2017 and 2016.

The remaining estimated aggregate amortization expense at September 30, 2017 is listed below (in thousands):
Year
 
Estimated Expense
2017
 
$
207

2018
 
734

2019
 
609

2020
 
484

2021
 
258

Total
 
$
2,292