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Note 7 - Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Goodwill and Intangible Assets Disclosure [Text Block]
7.
GOODWILL AND INTANGIBLE ASSETS
 
Goodwill totaled
$15.1
million for both years ended
December 
31,
2018,
and
2017.
Core deposit intangible carrying amount was
$2.4
million and
$2.7
million for the years ended
December 
31,
2018,
and
2017,
respectively. Core deposit accumulated amortization was
$1.0
million and
$692,000
for the years ended
December 
31,
2018,
and
2017.
 
Core deposit intangible assets are amortized to their estimated residual values over their expected useful lives, commonly of
ten
 years. Amortization expense totaled
$352,000
and
$374,000
in
2018
and
2017,
respectively. The estimated aggregate future amortization expense for core deposit intangible assets as of
December 
31,
2018
is as follows:
 
2019
  $
341
 
2020
   
332
 
2021
   
321
 
2022
   
309
 
2023
   
296
 
Thereafter
   
798
 
Total   $
2,397