NOTE 7 Goodwill and Other Intangible Assets

As of December 31, 2019 and 2018, goodwill totaled $27.3 million.

The following table summarizes the carrying amounts of goodwill, by segment, as of December 31, 2019 and 2018:


	December 31,		December 31,
(dollars in thousands)	2019		2018
Banking	$	20,131	$	20,131
Retirement and benefit services		7,198		7,198
Total goodwill	$	27,329	$	27,329

The gross carrying amount and accumulated amortization for each type of identifiable intangible asset are as follows:


	December 31, 2019						December 31, 2018
(dollars in thousands)	Gross Carrying Amount		Accumulated Amortization		Total		Gross Carrying Amount		Accumulated Amortization		Total
Identifiable customer intangibles	$	31,857	$	(14,287)	$	17,570	$	55,744	$	(34,972)	$	20,772
Core deposit intangible assets		4,993		(4,172)		821		7,216		(5,515)		1,701
Total intangible assets	$	36,850	$	(18,459)	$	18,391	$	62,960	$	(40,487)	$	22,473

At December 31, 2019, intangible assets and accumulated amortization were reduced by $26.1 million for asset retirements related to fully amortized intangibles.

Aggregate amortization expense for the years ended December 31, 2019, 2018, and 2017 was $4.1 million, $4.6 million, and $5.6 million, respectively.

Estimated aggregate amortization expense for future years is as follows:


(dollars in thousands)	Amount
2020	$	3,961
2021		3,266
2022		3,202
2023		3,202
2024		2,949
Thereafter		1,811
Total	$	18,391