Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

(In Thousands)

The carrying amounts of goodwill by operating segments for the three months ended March 31, 2021 were as follows:

	Community Banks		Insurance		Total
Balance at January 1, 2021	$	936,916	$	2,767	$	939,683
Additions to goodwill and other adjustments	—		—		—
Balance at March 31, 2021	$	936,916	$	2,767	$	939,683

The following table provides a summary of finite-lived intangible assets as of the dates presented:

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
March 31, 2021
Core deposit intangibles	$	82,492	$	(55,091)	$	27,401
Customer relationship intangible	2,470		(1,329)		1,141
Total finite-lived intangible assets	$	84,962	$	(56,420)	$	28,542
December 31, 2020
Core deposit intangibles	$	82,492	$	(53,539)	$	28,953
Customer relationship intangible	2,470		(1,284)		1,186
Total finite-lived intangible assets	$	84,962	$	(54,823)	$	30,139

Current year amortization expense for finite-lived intangible assets is presented in the table below.

	Three Months Ended
	March 31,
	2021		2020
Amortization expense for:
Core deposit intangibles	$	1,553	$	1,850
Customer relationship intangible	45		45
Total intangible amortization	$	1,598	$	1,895

The estimated amortization expense of finite-lived intangible assets for the year ending December 31, 2021 and the succeeding four years is summarized as follows:

	Core Deposit Intangibles		Customer Relationship Intangible		Total
2021	$	5,860	$	181	$	6,041
2022	4,940		181		5,121
2023	4,044		181		4,225
2024	3,498		181		3,679
2025	3,103		181		3,284