Other Comprehensive Income/Loss (Tables)

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Schedule of Other Comprehensive Income and Related Tax Effects

The gross amounts of each component of other comprehensive income and the related tax effects are as follows:

	Pre-tax				Tax Expense (Benefit)				Net of Tax
Three Months Ended September 30,	2020		2019		2020		2019		2020		2019
Investment securities available-for sale:
Change in net unrealized (loss) gain during period	$	(4.2)	$	4.2	$	(1.1)	$	1.0	$	(3.1)	$	3.2
Reclassification adjustment for net gains included in net income	(0.1)		(0.1)		—		—		(0.1)		(0.1)
Defined benefits post-retirement benefit plan:
Change in net actuarial gains	(0.1)		(0.2)		—		—		(0.1)		(0.2)
Total other comprehensive (loss) income	$	(4.4)	$	3.9	$	(1.1)	$	1.0	$	(3.3)	$	2.9

	Pre-tax				Tax Expense (Benefit)				Net of Tax
Nine Months Ended September 30,	2020		2019		2020		2019		2020		2019
Investment securities available-for sale:
Change in net unrealized gains during period	$	69.9	$	58.0	$	18.7	$	15.0	$	51.2	$	43.0
Reclassification adjustment for net gains included in net income	(0.1)		(0.1)		—		—		(0.1)		(0.1)
Reclassification adjustment for securities transferred from held-to-maturity to available-for-sale	—		(6.0)		—		(1.6)		—		(4.4)
Unrealized loss on derivatives	0.2		—		—		—		0.2		—
Defined benefits post-retirement benefit plan:
Change in net actuarial gains	(0.5)		(0.5)		(0.1)		—		(0.4)		(0.5)
Total other comprehensive income	$	69.5	$	51.4	$	18.6	$	13.4	$	50.9	$	38.0

Schedule of Accumulated Other Comprehensive Income (Loss)

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

	September 30, 2020		December 31, 2019
Net unrealized gains on investment securities available-for-sale	$	62.1	$	10.6
Net unrealized loss on derivatives	(0.2)		—
Net actuarial gains on defined benefit post-retirement benefit plans	—		0.4
Net accumulated other comprehensive gains	$	61.9	$	11.0