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Goodwill
12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
Goodwill

At December 31, 2018 and 2017, the carrying value of goodwill was $94.7 million. There were no changes in the carrying value of goodwill for the year ended December 31, 2018 or 2017.

The Company performs its annual goodwill impairment assessment as of November 30th, and at interim periods if indicators of potential impairment exist. The Company completed its annual goodwill impairment test as of November 30, 2018, 2017 and 2016 and determined goodwill was not impaired. Accumulated impairment losses were $3.6 million as of December 31, 2018, 2017 and 2016.
Other Intangible Assets

The gross carrying amount and accumulated amortization of other intangible assets were as follows at the periods indicated:
 
 
December 31,
 
 
2018
 
2017
  
 
Gross
Carrying
Amount
 
Accumulated Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated Amortization
 
Net
Carrying
Amount
Core deposit intangible
 
$
23,908

 
$
(19,678
)
 
$
4,230

 
$
23,908

 
$
(18,953
)
 
$
4,955

Trust relationship intangible
 

 

 

 
753

 
(753
)
 

Total
 
$
23,908

 
$
(19,678
)
 
$
4,230

 
$
24,661

 
$
(19,706
)
 
$
4,955



For the year ended December 31, 2018, 2017 and 2016, the Company recorded amortization expense of $725,000, $1.8 million and $1.9 million, respectively.

The following table reflects the estimated amortization expense for other intangible assets over the period of estimated economic benefit:
 
 
Core Deposit
Intangible
2019
 
$
705

2020
 
682

2021
 
655

2022
 
625

2023
 
592

Thereafter
 
971

Total
 
$
4,230