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GOODWILL AND OTHER INTANGIBLE ASSETS, NET
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND OTHER INTANGIBLE ASSETS, NET GOODWILL AND OTHER INTANGIBLE ASSETS, NET
At December 31, 2020 and 2019, we had goodwill of $37.1 million, which included accumulated impairment losses of $2.1 million recognized in 2017 as a result of us discontinuing our mortgage banking division.
We conducted our annual impairment test as of August 31, 2020 and again as of October 1, 2020 for this transition and concluded that there was no impairment as of those dates.
Core deposit intangibles are amortized over their useful lives ranging from four to ten years. As of December 31, 2020, the weighted-average remaining amortization period for core deposit intangibles was approximately 3.8 years.
($ in thousands)Gross Carrying ValueAccumulated AmortizationNet Carrying Value
December 31, 2020
Core deposit intangibles$30,904 $28,271 $2,633 
December 31, 2019
Core deposit intangibles$30,904 $26,753 $4,151 

There was no impairment of goodwill for the years ended December 31, 2020, 2019 and 2018.
Aggregate amortization of intangible assets was $1.5 million, $2.2 million and $3.0 million for the years ended December 31, 2020, 2019, and 2018. The following table presents estimated future amortization expenses as of December 31, 2020:
($ in thousands)20212022202320242025Total
Estimated future amortization expense$1,082 $799 $517 $235 $— $2,633