LOANS AND LEASES - Troubled Debt Restructurings, Payment Default (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) contract	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) contract
Financing Receivable, Modified [Line Items]
Number of Contracts | contract		4		7
Recorded Investment	$ 0.6	$ 0.0	$ 3.2	$ 0.0
Total commercial loans and leases
Financing Receivable, Modified [Line Items]
Number of Contracts | contract		0		2
Recorded Investment	0.6	$ 0.0	2.8	$ 0.0
Total commercial loans and leases | Commercial real estate
Financing Receivable, Modified [Line Items]
Recorded Investment	0.5		1.1
Total commercial loans and leases | Commercial and industrial
Financing Receivable, Modified [Line Items]
Number of Contracts | contract		0		2
Recorded Investment	$ 0.1	$ 0.0	1.7	$ 0.0
Total consumer loans
Financing Receivable, Modified [Line Items]
Number of Contracts | contract		4		5
Recorded Investment		$ 0.0	0.4	$ 0.0
Total consumer loans | Direct installment
Financing Receivable, Modified [Line Items]
Number of Contracts | contract		1		2
Recorded Investment		$ 0.0		$ 0.0
Total consumer loans | Residential mortgages
Financing Receivable, Modified [Line Items]
Number of Contracts | contract		3		3
Recorded Investment		$ 0.0	$ 0.3	$ 0.0