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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2020
Goodwill and Other Intangible Assets [Abstract]  
Goodwill and Other Intangible Assets
8.          Goodwill and Other Intangible Assets


A summary of goodwill is as follows:

(In thousands)
     
January 1, 2020
 
$
274,769
 
Goodwill acquired
   
5,772
 
December 31, 2020
 
$
280,541
 
         
January 1, 2019
 
$
274,769
 
Goodwill acquired
   
-
 
December 31, 2019
 
$
274,769
 

The Company has intangible assets with definite useful lives capitalized on its consolidated balance sheet in the form of core deposit and other identified intangible assets. These intangible assets are amortized over their estimated useful lives, which range primarily from one to twenty years.

There was no impairment of goodwill recorded during the year ended December 31, 2020 and 2019.

A summary of core deposit and other intangible assets follows:

 
December 31,
 
(In thousands)
 
2020
   
2019
 
Core deposit intangibles:
           
Gross carrying amount
 
$
8,951
   
$
8,951
 
Less: accumulated amortization
   
8,463
     
7,988
 
Net carrying amount
 
$
488
   
$
963
 
                 
Identified intangible assets:
               
Gross carrying amount
 
$
27,057
   
$
34,623
 
Less: accumulated amortization
   
15,810
     
23,566
 
Net carrying amount
 
$
11,247
   
$
11,057
 
                 
Total intangibles:
               
Gross carrying amount
 
$
36,008
   
$
43,574
 
Less: accumulated amortization
   
24,273
     
31,554
 
Net carrying amount
 
$
11,735
   
$
12,020
 

Amortization expense on intangible assets with definite useful lives totaled $3.4 million for 2020, $3.6 million for 2019 and $4.0 million for 2018. Amortization expense on intangible assets with definite useful lives is expected to total $2.8 million for 2021, $2.2 million for 2022, $1.8 million for 2023, $1.5 million for 2024, $1.2 million for 2025 and $2.3 million thereafter. Other identified intangible assets include customer lists and non-compete agreements. 

During the years ended December 31, 2020 and 2019, there was no impairment of intangible assets.