Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The carrying amount of goodwill and other intangible assets is summarized below as of the dates indicated (in thousands):

	December 31,
	2021		2020
Core deposit intangible	$	38,192	$	36,162
Less: accumulated amortization	(25,870)		(22,148)
Net core deposit intangible	12,322		14,014
Customer relationship intangible	8,400		—
Less: accumulated amortization	(322)		—
Net customer relationship intangible	8,078		—
Total intangibles subject to amortization, net	20,400		14,014
Goodwill	452,007		367,809
Total goodwill and other intangible assets, net	$	472,407	$	381,823

In addition to the FinTrust customer relationship intangible discussed in Note 3, during 2021 United purchased the customer lists of two financial advisory firms for an aggregate purchase price of $870,000. All consideration paid was allocated to a customer relationship intangible.

The following is a summary of changes in the carrying amounts of goodwill for the years indicated (in thousands):

	Goodwill (1)
December 31, 2019	$	327,425
Acquisition of Three Shores	40,384
December 31, 2020	367,809
Acquisition of FinTrust	14,163
Acquisition of Aquesta	70,035
December 31, 2021	$	452,007

(1) Goodwill balances presented are shown net of accumulated impairment losses of $306 million incurred prior to 2019. Gross goodwill for December 31, 2021, 2020, and 2019 totaled $758 million, $673 million and $633 million, respectively.

The estimated aggregate amortization expense for future periods for finite lived intangibles is as follows (in thousands): 

Year
2022	$	4,081
2023	3,447
2024	2,849
2025	2,169
2026	1,709
Thereafter	6,145
Total	$	20,400