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GOODWILL AND INTANGIBLE ASSETS
3 Months Ended
Mar. 31, 2018
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 March 31, 2018 and 2017 were as follows (in thousands):
 
 
2018
 
2017
Beginning of year
 
$
21,824

 
$
21,824

Acquired goodwill
 

 

Ending balance March 31,
 
$
21,824

 
$
21,824



Acquired intangible assets were as follows at March 31, 2018 and December 31, 2017 (in thousands):
 
 
At March 31, 2018
 
At December 31, 2017
 
 
Balance Acquired
 
Accumulated Amortization
 
Balance Acquired
 
Accumulated Amortization
Core deposit intangibles
 
$
5,975

 
$
5,301

 
$
5,975

 
$
5,196

Other customer relationship intangibles
 
5,633

 
4,416

 
5,633

 
4,327

Total
 
$
11,608

 
$
9,717

 
$
11,608

 
$
9,523



Aggregate amortization expense was $0.2 million for both of the three month periods ended March 31, 2018 and 2017.

The remaining estimated aggregate amortization expense at March 31, 2018 is listed below (in thousands):
Year
 
Estimated Expense
2018
 
$
540

2019
 
609

2020
 
484

2021
 
258

2022
 

Total
 
$
1,891