Goodwill and Core Deposit Intangibles (Tables)

6 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangibles

Other intangible assets are comprised of core deposit intangibles (“CDI”) and other customer relationship intangibles (“OCRI”) and amounted to the following at June 30, 2023 and December 31, 2022:

June 30, 2023	CDI		OCRI		Total
Gross other intangible assets, at January 1, 2023	$	154.7	$	22.8	$	177.5
Accumulated amortization	(85.7)		(2.7)		(88.4)
Net other intangible assets, at June 30, 2023	$	69.0	$	20.1	$	89.1
December 31, 2022
Gross other intangible assets, at January 1, 2022	$	106.0	$	—	$	106.0
Amounts established through acquisition	50.1		22.8		72.9
Reductions due to sale of health savings accounts	(1.4)		—		(1.4)
Accumulated amortization	(78.8)		(1.7)		(80.5)
Net other intangible assets, at December 31, 2022	$	75.9	$	21.1	$	97.0

Schedule of Future Amortization Expense

The following table provides the estimated aggregate future amortization expense of other intangible assets at June 30, 2023:

Years Ending December 31,	CDI		OCRI		Total
2023 remaining	$	6.8	$	0.9	$	7.7
2024	12.7		1.9		14.6
2025	11.8		1.9		13.7
2026	10.9		1.9		12.8
2027	8.2		1.9		10.1
Thereafter	18.6		11.6		30.2
Total	$	69.0	$	20.1	$	89.1