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LOANS AND LEASES - Schedule of Loan Modifications, Subsequently Defaulted (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	$ 8.1	$ 52.1	$ 28.2
Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	4.2	24.1	22.4
Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.6	15.9	0.6
Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.7	0.0
Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	3.3	11.4	5.2
Total commercial loans and leases
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	5.3	46.3	27.4
Total commercial loans and leases | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	2.0	18.7	21.9
Total commercial loans and leases | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	15.5	0.3
Total commercial loans and leases | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.7	0.0
Total commercial loans and leases | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	3.3	11.4	5.2
Total commercial loans and leases | Commercial real estate
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	3.1	6.9	5.6
Total commercial loans and leases | Commercial real estate | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	1.1	0.3	0.4
Total commercial loans and leases | Commercial real estate | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total commercial loans and leases | Commercial real estate | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.7	0.0
Total commercial loans and leases | Commercial real estate | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	2.0	5.9	5.2
Total commercial loans and leases | Commercial and industrial
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	2.2	39.4	21.8
Total commercial loans and leases | Commercial and industrial | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.9	18.4	21.5
Total commercial loans and leases | Commercial and industrial | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	15.5	0.3
Total commercial loans and leases | Commercial and industrial | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total commercial loans and leases | Commercial and industrial | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	1.3	5.5	0.0
Total consumer loans
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	2.8	5.8	0.8
Total consumer loans | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	2.2	5.4	0.5
Total consumer loans | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.6	0.4	0.3
Total consumer loans | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total consumer loans | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total consumer loans | Direct installment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.3	0.7	0.1
Total consumer loans | Direct installment | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.3	0.7	0.1
Total consumer loans | Direct installment | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total consumer loans | Direct installment | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total consumer loans | Direct installment | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total consumer loans | Residential mortgages
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	2.5	5.1	0.6
Total consumer loans | Residential mortgages | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	1.9	4.7	0.3
Total consumer loans | Residential mortgages | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.6	0.4	0.3
Total consumer loans | Residential mortgages | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	0.0	0.0	0.0
Total consumer loans | Residential mortgages | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted	$ 0.0	$ 0.0	0.0
Total consumer loans | Consumer lines of credit
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted			0.1
Total consumer loans | Consumer lines of credit | Term Extension
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted			0.1
Total consumer loans | Consumer lines of credit | Term Extension and Rate Reduction
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted			0.0
Total consumer loans | Consumer lines of credit | Balloon Payment
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted			0.0
Total consumer loans | Consumer lines of credit | Other
Financing Receivable, Modified [Line Items]
Total loans that subsequently defaulted			$ 0.0

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