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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The change in goodwill during the years ended December 31, 2018, 2017, and 2016 is as follows (in thousands):
 
2018
 
2017
 
2016
Balance, beginning of year
$
53,777

 
$
40,231

 
$
29,917

Acquired goodwill

 
13,546

 
10,314

Impairment

 

 

Balance, end of year
$
53,777

 
$
53,777

 
$
40,231

Schedule of Expected Amortization Expense
The following table summarizes the Company’s estimated core deposit intangible amortization expense for each of the next five years (in thousands):
Years Ending December 31,
 
Estimated Core Deposit Intangible Amortization
2019
 
$
696

2020
 
696

2021
 
661

2022
 
453

2023
 
66

Thereafter
 

Total
 
$
2,572