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GOODWILL AND INTANGIBLE ASSETS
6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS
The changes in goodwill included in the core banking segment during the six month periods ended June 30, 2022 and 2021 were as follows (in thousands):
 20222021
Beginning of year$21,824 $21,824 
Acquired goodwill— — 
Ending balance June 30,$21,824 $21,824 


Acquired intangible assets were as follows at June 30, 2022 and December 31, 2021 (in thousands):
 At June 30, 2022At December 31, 2021
 Balance AcquiredAccumulated AmortizationBalance AcquiredAccumulated Amortization
Core deposit intangibles$5,975 $5,975 $5,975 $5,974 
Other customer relationship intangibles5,633 5,633 5,633 5,619 
Total$11,608 $11,608 $11,608 $11,593 

Aggregate amortization expense was $4 thousand and $0.1 million for the three month periods ended June 30, 2022 and 2021, respectively. Aggregate amortization expense was $15.0 thousand and $0.2 million for the six month periods ended June 30, 2022 and 2021, respectively. As of June 30, 2022, there is no remaining estimated aggregate amortization expense.
The amount of goodwill reflected in the Corporation's Unaudited Consolidated Financial statements is required to be tested by management for impairment on at least an annual basis. Goodwill impairment testing is performed annually as of December 31 and no impairment charges were incurred.