The carrying amount of goodwill totaled $66.1 million as of both September 30, 2020 and December 31, 2019. The Company performs a goodwill impairment test on an annual basis as of October 1st or more frequently if events and circumstances warrant.

	Banking		Non-Banking		Total
Balance, December 31, 2019	$	48,536	$	17,526	$	66,062
No activity during the period		—		—		—
Balance, September 30, 2020	$	48,536	$	17,526	$	66,062

Goodwill is not amortized but, instead, is subject to impairment tests on at least an annual basis, and more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. Based on the volatility in the capital markets in 2020 and overall economic conditions as a result of the COVID-19 pandemic accompanied by a decline in the Company’s stock price, a quantitative assessment was performed for the Banking segment in the third quarter of 2020. Based on this quantitative assessment, the Company concluded that goodwill was not impaired for the Banking segment. Based on its qualitative assessment for each of the SDN, Courier Capital and HNP Capital reporting units, the Company concluded that it was more likely than not that goodwill was not impaired as of September 30, 2020. Therefore, no quantitative assessment was deemed necessary as of September 30, 2020.

The Company has other intangible assets that are amortized, consisting of core deposit intangibles and other intangibles (primarily related to customer relationships). Gross carrying amount, accumulated amortization and net book value, were as follows (in thousands):

	September 30,			December 31,
	2020			2019
Other intangibles assets:
Gross carrying amount	$	15,925		$	15,925
Accumulated amortization		(7,925	)		(7,064	)
Net book value	$	8,000		$	8,861

Amortization expense for total other intangible assets was $280 thousand and $861 thousand for the three and nine months ended September 30, 2020, respectively, and $309 thousand and $948 thousand for the three and nine months ended September 30, 2019, respectively. As of September 30, 2020, the estimated amortization expense of other intangible assets for the remainder of 2020 and each of the next five years is as follows (in thousands):

2020 (remainder of year)	$	273
2021		1,014
2022		923
2023		852
2024		783
2025		714