GOODWILL AND OTHER INTANGIBLES

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and other intangible assets are presented in the tables below. The Company had one acquisition during 2019. There was no acquisition during 2018. In accordance with applicable accounting guidance, the Company allocated the amount paid to the fair value of the net assets acquired, with any excess amounts recorded as goodwill. The goodwill balance is allocated to the consolidated Company. The activity impacting goodwill in 2019 and 2018 is as follows:



(In thousands)	2019			2018
Balance, beginning of the period	$	518,325		$	519,287
Goodwill acquired and adjusted:
SI Financial Group, Inc.	36,379			—
Adjustments (1)	(942		)	(962		)
Balance, end of the period	$	553,762		$	518,325

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(1)	In 2019, goodwill related to the SI Financial Group acquisition was adjusted to reflect new information available during the one-year measurement period. In 2018, goodwill related to the Commerce acquisition was adjusted to reflect new information available during the one-year measurement period.

The Company tests goodwill impairment annually as of June 30 using second quarter data. The results of the quantitative assessment indicated it is more likely than not that the reporting unit's fair value exceeds its carrying amount, and accordingly, the two-step impairment test was not performed. When events or changes in circumstances indicate that impairment is possible, the Company performs additional reviews. No impairment was recorded on goodwill for 2019, 2018, and 2017.

The components of other intangible assets are as follows:



(In thousands)	Gross Intangible Assets		Accumulated Amortization			Net Intangible Assets
December 31, 2019
Non-maturity deposits (core deposit intangible)	$	84,903	$	(42,663	)	$	42,240
Insurance contracts	7,558		(7,553		)	5
All other intangible assets	7,866		(4,496		)	3,370
Total	$	100,327	$	(54,712	)	$	45,615
December 31, 2018
Non-maturity deposits (core deposit intangible)	$	66,923	$	(37,410	)	$	29,513
Insurance contracts	7,558		(7,542		)	16
All other intangible assets	7,866		(3,977		)	3,889
Total	$	82,347	$	(48,929	)	$	33,418

Other intangible assets are amortized on a straight-line or accelerated basis over their estimated lives, which range from four to fifteen years. Amortization expense related to intangibles totaled $5.8 million in 2019, $4.9 million in 2018, and $3.5 million in 2017.

The estimated aggregate future amortization expense for intangible assets remaining at year-end 2019 is as follows: 2020- $6.2 million; 2021- $6.0 million; 2022- $5.9 million; 2023- $5.6 million; 2024- $5.4 million; and thereafter- $16.6 million. For the years 2019, 2018, and 2017, no impairment charges were identified for the Company’s intangible assets.