Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest income:
Interest and fees on loans	$ 151.7	$ 107.8
Interest and dividends on investment securities:
Taxable	29.3	15.8
Exempt from federal taxes	1.3	1.4
Interest on deposits in banks	1.7	0.3
Total interest income	184.0	125.3
Interest expense:
Interest on deposits	3.0	2.3
Interest on securities sold under repurchase agreements	0.3	0.1
Interest on long-term debt	1.7	1.5
Interest on subordinated debentures held by subsidiary trusts	1.0	0.7
Total interest expense	6.0	4.6
Net interest income	178.0	120.7
Provision for (reversal of) credit losses	61.3	(5.1)
Net interest income after provision for (reversal of) credit losses	116.7	125.8
Non-interest income:
Debt Securities, Available-for-sale, Gain (Loss)	(0.1)	0.0
Mortgage banking revenues	8.4	11.6
Other income	6.0	4.1
Total non-interest income	49.2	38.1
Non-interest expense:
Salaries and wages	60.0	39.0
Employee benefits	21.2	16.1
Outsourced technology services	11.3	8.1
Occupancy, net	10.0	7.3
Furniture and equipment	5.4	4.4
OREO expense, net of income	0.1	(0.1)
Professional fees	3.9	3.4
FDIC insurance premiums	3.3	1.6
Other intangibles amortization	3.6	2.5
Other expenses	23.2	16.1
Acquisition related expenses	65.2	0.0
Noninterest Expense	207.2	98.4
(Loss) income before income tax	(41.3)	65.5
(Benefit from) provision for income tax	(7.9)	14.1
Net (loss) income	$ (33.4)	$ 51.4
Earnings per common share, basic (in dollars per share)	$ (0.36)	$ 0.83
Earnings per common share, diluted (in dollars per share)	$ (0.36)	$ 0.83
Weighted average common shares outstanding, basic (in shares)	92,855,173	61,591,877
Weighted average common shares outstanding, diluted (in shares)	92,855,173	61,714,063
Payment services revenues
Non-interest income:
Non-interest income	$ 14.8	$ 10.2
Wealth management revenues
Non-interest income:
Wealth management revenues	8.1	6.3
Service charges on deposit accounts
Non-interest income:
Non-interest income	7.7	3.8
Other service charges, commissions, and fees
Non-interest income:
Non-interest income	$ 4.3	$ 2.1