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Goodwill and Intangible Assets
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets GOODWILL AND INTANGIBLE ASSETS
The table below presents a summary of goodwill:
($ in thousands)Years ended December 31,
20202019
Goodwill, beginning of year$210,344 $117,345 
Additions from acquisition50,223 92,999 
Goodwill, end of year$260,567 $210,344 

The table below presents a summary of intangible assets:
($ in thousands)Years ended December 31,
20202019
Core deposit intangible, net, beginning of year$26,076 $8,553 
Additions from acquisition2,681 23,066 
Amortization(5,673)(5,543)
Core deposit intangible, net, end of year$23,084 $26,076 

Amortization expense on the core deposit intangibles was $5.7 million, $5.5 million, and $2.5 million for the years ended December 31, 2020, 2019, and 2018, respectively. The core deposit intangibles are being amortized over a 10-year period.

The following table reflects the amortization schedule for the core deposit intangible at December 31, 2020.
YearCore Deposit Intangible ($ in thousands)
2021$5,295 
20224,517 
20233,840 
20243,162 
20252,485 
After 20253,785 
 $23,084