7. Goodwill and Other Intangible Assets

A summary of goodwill is as follows:

(In thousands)
January 1, 2018	$	268,043
Goodwill Acquired		6,726
December 31, 2018	$	274,769

January 1, 2017	$	265,439
Goodwill Acquired		2,604
December 31, 2017	$	268,043

The Company has intangible assets with definite useful lives capitalized on its consolidated balance sheet in the form of core deposit and other identified intangible assets. These intangible assets are amortized over their estimated useful lives, which range primarily from one to twenty years.

There was no impairment of goodwill recorded during the year ended December 31, 2018 and 2017.

A summary of core deposit and other intangible assets follows:

	December 31,
(In thousands)	2018		2017
Core deposit intangibles:
Gross carrying amount	$	8,975	$	8,975
Less: accumulated amortization		7,377		6,581
Net carrying amount	$	1,598	$	2,394

Identified intangible assets:
Gross carrying amount	$	34,623	$	33,632
Less: accumulated amortization		20,622		22,606
Net carrying amount	$	14,001	$	11,026

Total intangibles:
Gross carrying amount	$	43,598	$	42,607
Less: accumulated amortization		27,999		29,187
Net carrying amount	$	15,599	$	13,420

Amortization expense on intangible assets with definite useful lives totaled $4.0 million for 2018, $4.0 million for 2017 and $3.9 million for 2016. Amortization expense on intangible assets with definite useful lives is expected to total $3.6 million for 2019, $3.0 million for 2020, $2.3 million for 2021, $1.8 million for 2022, $1.4 million for 2023 and $3.5 million thereafter. Other identified intangible assets include customer lists and non-compete agreements.

During the year ended December 31, 2018, there was no impairment of intangible assets. For the year ended December 31, 2017 the Company disposed of an intangible asset that resulted in an impairment charge of $1.5 million.