LEASES - Additional Information (Details) $ in Millions	Mar. 31, 2022 USD ($)
Leases [Abstract]
Operating lease, right-of-use asset, statement of financial position [extensible enumeration]	Other assets
Operating lease, liability, statement of financial position [extensible enumeration]	Other liabilities
Operating lease, right-of-use asset	$ 136.7
Operating lease, liability	$ 146.0
Finance lease right-of-use asset [extensible enumeration]	Premises and equipment, net
Finance lease liability [extensible enumeration]	Other liabilities
Finance lease right-of-use asset	$ 15.5
Finance lease liability	15.7
Lessee, operating lease, right-of-use asset, lease not yet commenced	69.2
Lessee, operating lease, lease not yet commenced, liability	$ 90.6
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease not yet commenced, term of contract	16 years