Other Comprehensive Income/Loss (Tables)

3 Months Ended

Mar. 31, 2026

Equity [Abstract]

Schedule of Other Comprehensive Income and Related Tax Effects

The gross amounts of each component of other comprehensive loss and the related tax effects for the periods indicated are as follows:

	Pre-tax				Tax (Expense) Benefit				Net of Tax
Three Months Ended March 31,	2026		2025		2026		2025		2026		2025
Investment securities available-for sale:
(Increase) decrease in unrealized losses during the period	$	(23.5)	$	70.7	$	5.8	$	(17.7)	$	(17.7)	$	53.0
Net change in unamortized gains on available-for-sale securities transferred into held-to-maturity	0.1		—		—		—		0.1		—
Cash flow hedge:
Change in unrealized gains on derivatives	—		1.0		—		(0.3)		—		0.7
Reclassification adjustment for derivatives net losses included in net income	—		1.0		—		(0.3)		—		0.7
Total other comprehensive (loss) income	$	(23.4)	$	72.7	$	5.8	$	(18.3)	$	(17.6)	$	54.4

Schedule of Accumulated Other Comprehensive Income (Loss)

The components of accumulated other comprehensive loss, net of related tax effects, are as follows:

	March 31, 2026		December 31, 2025
Net unrealized loss on investment securities available-for-sale	$	(190.3)	$	(172.6)
Net unrealized loss on investment securities transferred to held-to-maturity	(5.6)		(5.7)
Net unrealized gain on derivatives	0.2		0.2
Net accumulated other comprehensive loss	$	(195.7)	$	(178.1)