Goodwill and Other Intangible Assets

(In Thousands)

The carrying amounts of goodwill by operating segments for the nine months ended September 30, 2018 were as follows:



	Community Banks		Insurance		Total
Balance at January 1, 2018	$	608,279	$	2,767	$	611,046
Addition to goodwill from acquisition	316,215		—		316,215
Adjustment to previously recorded goodwill	—		—		—
Balance at September 30, 2018	$	924,494	$	2,767	$	927,261

The addition of goodwill during 2018 represents the excess of the purchase price over the fair value of assets acquired and liabilities assumed in the Brand acquisition. The Company is finalizing the fair values of certain assets, including loans, property and equipment, taxes and certain other assets, related to the acquisition; as such, the recorded balance of goodwill is subject to change.

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



	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
September 30, 2018
Core deposit intangibles	$	82,312	$	(36,497	)	$	45,815
Customer relationship intangible	1,970		(931		)	1,039
Total finite-lived intangible assets	$	84,282	$	(37,428	)	$	46,854
December 31, 2017
Core deposit intangibles	$	54,958	$	(31,586	)	$	23,372
Customer relationship intangible	1,970		(832		)	1,138
Total finite-lived intangible assets	$	56,928	$	(32,418	)	$	24,510

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



	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Amortization expense for:
Core deposit intangibles	$	1,732	$	1,733	$	4,911	$	4,723
Customer relationship intangible	33		33		99		99
Total intangible amortization	$	1,765	$	1,766	$	5,010	$	4,822

The estimated amortization expense of finite-lived intangible assets for the year ending December 31, 2018 and the succeeding four years is summarized as follows:



	Core Deposit Intangibles		Customer Relationship Intangible		Total

2018	$	7,041	$	131	$	7,172
2019	7,947		131		8,078
2020	6,921		131		7,052
2021	5,843		131		5,974
2022	4,923		131		5,054