Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Goodwill. Year-end goodwill was as follows:

	2020		2019
Goodwill	$	654,952	$	654,952

Other Intangible Assets. Year-end other intangible assets were as follows:

	Gross Intangible Assets		Accumulated Amortization		Net Intangible Assets
2020
Core deposits	$	9,300	$	(8,004)	$	1,296
Customer relationships	2,886		(2,619)		267
	$	12,186	$	(10,623)	$	1,563
2019
Core deposits	$	9,300	$	(7,257)	$	2,043
Customer relationships	3,388		(2,950)		438
	$	12,688	$	(10,207)	$	2,481

Other intangible assets are amortized on an accelerated basis over their estimated lives, which range from 5 to 10 years. Amortization expense related to intangible assets totaled $918 thousand in 2020, $1.2 million in 2019, and $1.4 million in 2018. The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2020 is as follows:

2021	$	697
2022	481
2023	282
2024	87
2025	11
Thereafter	5
	$	1,563