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Goodwill and Core Deposit Intangibles
12 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Core Deposit Intangibles
Goodwill and Core Deposit Intangibles

At December 31, 2016, the Company had goodwill of $102 million, of which $51.7 million was related to the SCAF acquisition. The following table presents changes in the carrying value of goodwill for the periods indicated:
 
2016
 
2015
 
(dollars in thousands)
Balance, beginning of year
$
50,832

 
$
22,950

Goodwill acquired during the year
51,658

 
27,882

Impairment losses

 

Balance, end of year
$
102,490

 
$
50,832

Accumulated impairment losses at end of year

 



The Company’s goodwill was evaluated for impairment during the fourth quarter of 2016, with no impairment loss recognition considered necessary.

The Company's change in the gross amount of core deposit intangibles and the related accumulated amortization consisted of the following at December 31:

 
2016
 
2015
 
2014
 
(dollars in thousands)
Gross amount of CDI:
 
 
 
 
 
Balance, beginning of year
$
10,782

 
$
7,876

 
$
7,876

Additions due to acquisitions
4,320

 
2,906

 

Balance, end of year
15,102

 
10,782

 
7,876

Accumulated amortization
 
 
 
 
 
Balance, beginning of year
(3,612
)
 
(2,262
)
 
(1,248
)
Amortization
(2,039
)
 
(1,350
)
 
(1,014
)
Balance, end of year
(5,651
)
 
(3,612
)
 
(2,262
)
Net CDI, end of year
$
9,451

 
$
7,170

 
$
5,614



The estimated aggregate amortization expense related to our core deposit intangible assets for each of the next five years is $2.1 million, $2.0 million, $1.7 million, $1.7 million, and $1.4 million. The Company’s core deposit intangibles is evaluated for impairment if events and circumstances indicate possible impairment. Factors that my attribute to impairment include customer attrition and run-off. Management is unaware of any events and/or circumstances that would indicate a possible impairment to the core deposit intangibles.