The carrying amount of goodwill and intangible assets attributable to each of our reporting segments is presented in the following table (in thousands):

	December 31, 2019		Net Adjustments			Sale of ZCM			December 31, 2020
Goodwill
Global Wealth Management	$	344,981	$	—		$	(9,972	)	$	335,009
Institutional Group		849,093		(2,104	)		—			846,989
	$	1,194,074	$	(2,104	)	$	(9,972	)	$	1,181,998

	December 31, 2019		Adjustments/ Sale of ZCM			Amortization			December 31, 2020
Intangible assets
Global Wealth Management	$	53,279	$	(1,532	)	$	(7,076	)	$	44,671
Institutional Group		108,494		363			(12,544	)		96,313
	$	161,773	$	(1,169	)	$	(19,620	)	$	140,984

The adjustments to goodwill and intangible assets during the year ended December 31, 2020, are primarily attributable to the sale of ZCM, and the acquisitions of Mooreland Partners on July 1, 2019, B&F Capital Markets on September 3, 2019, MainFirst Bank on November 1, 2019, and GMP Capital, Inc. on December 6, 2019. See Note 3 in the notes to our consolidated financial statements for additional information regarding our acquisitions.

On March 27, 2020, the Company completed the sale of ZCM, a wholly owned asset management subsidiary. The Company recorded a gain on the sale, which included a write-off of allocated goodwill and the remaining net book value of intangible assets.

The goodwill represents the value expected from the synergies created through the operational enhancement benefits that will result from the integration of each respective business, its employees, and customer base.

Amortizable intangible assets consist of acquired customer relationships, trade names, non-compete agreements, core deposits, investment banking backlog, and acquired technology that are amortized over their contractual or determined useful lives. Intangible assets as of December 31, 2020 and 2019, were as follows (in thousands):

	December 31, 2020				December 31, 2019
	Gross Carrying Value		Accumulated Amortization		Gross Carrying Value		Accumulated Amortization
Customer relationships	$	202,342	$	85,152	$	207,253	$	75,987
Trade names		28,659		15,660		28,659		13,649
Non-compete agreements		9,240		4,229		9,490		2,828
Core deposits		8,615		4,809		8,615		2,985
Investment banking backlog		4,245		2,734		4,245		1,787
Acquired technology		840		373		840		93
	$	253,941	$	112,957	$	259,102	$	97,329

Amortization expense related to intangible assets was $19.6 million, $16.0 million, and $12.6 million for the years ended December 31, 2020, 2019, and 2018, respectively, and is included in other operating expenses in the consolidated statements of operations.

The weighted-average remaining lives of the following intangible assets at December 31, 2020, are: customer relationships, 10.5 years; trade name, 9.3 years; non-compete agreements, 6.1 years; core deposits, 3.5 years; investment banking backlog, 8.1 years; and acquired technology, 1.7 years. We have an intangible asset that is not subject to amortization and is, therefore, not included in the table below. As of December 31, 2020, we expect amortization expense in future periods to be as follows (in thousands):

Fiscal year
2021	$	17,806
2022		16,454
2023		14,601
2024		13,886
2025		11,826
Thereafter		64,293
	$	138,866