Goodwill and Core Deposit Intangibles (Tables)

6 Months Ended

Jun. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table details changes in the recorded amount of goodwill as of the dates indicated:

	As of June 30,
	June 30, 2022		December 31, 2021
Net carrying value at beginning of the period	$	621.6	$	621.6
Provisional additions to goodwill from acquisition	478.2		—
Net carrying value at end of period	$	1,099.8	$	621.6

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, 2022 and December 31, 2021:

As of June 30, 2022	CDI		OCRI		Total
Gross other intangible assets, at beginning of the period	$	106.0	$	—	$	106.0
Provisional amounts established through acquisition	50.1		22.8		72.9
Reductions due to sale of health savings accounts	(1.4)		—		(1.4)
Accumulated amortization	(71.6)		(0.8)		(72.4)
Net other intangible assets, end of period	$	83.1	$	22.0	$	105.1
December 31, 2021
Gross other intangible assets, at beginning of the period	$	106.0	$	—	$	106.0
Accumulated amortization	(64.7)		—		(64.7)
Net other intangible assets, end of period	$	41.3	$	—	$	41.3

Schedule of Future Amortization Expense

The following table provides the estimated aggregate future amortization expense of other intangible assets:

Years Ending December 31,	CDI		OCRI		Total
2022 remaining	$	7.2	$	0.9	$	8.1
2023	13.7		1.9		15.6
2024	12.7		1.9		14.6
2025	11.8		1.9		13.7
2026	10.9		1.9		12.8
Thereafter	26.8		13.5		40.3
Total	$	83.1	$	22.0	$	105.1