Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying amounts of goodwill by operating segments

The carrying amounts of goodwill by operating segments for the three months ended March 31, 2023 were as follows:

	Community Banks		Insurance		Total
Balance at January 1, 2023	$	988,941	$	2,767	$	991,708
Deductions to goodwill and other adjustments	(43)		—		(43)
Balance at March 31, 2023	$	988,898	$	2,767	$	991,665

Summary of finite-lived intangible assets

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, 2023
Core deposit intangibles	$	82,492	$	(65,431)	$	17,061
Customer relationship intangible	7,670		(1,981)		5,689
Total finite-lived intangible assets	$	90,162	$	(67,412)	$	22,750
December 31, 2022
Core deposit intangibles	$	82,492	$	(64,339)	$	18,153
Customer relationship intangible	7,670		(1,647)		6,023
Total finite-lived intangible assets	$	90,162	$	(65,986)	$	24,176

Current year amortization expense for finite-lived intangible assets

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

	Three Months Ended
	March 31,
	2023		2022
Amortization expense for:
Core deposit intangibles	$	1,092	$	1,321
Customer relationship intangible	334		45
Total intangible amortization	$	1,426	$	1,366

Estimated amortization expense of finite-lived intangible assets

The estimated amortization expense of finite-lived intangible assets for the year ending December 31, 2023 and the succeeding four years is summarized as follows:

	Core Deposit Intangibles		Customer Relationship Intangible		Total
2023	$	4,043	$	1,337	$	5,380
2024	3,498		1,192		4,690
2025	3,102		1,048		4,150
2026	2,899		860		3,759
2027	2,774		628		3,402