LEASES - Additional Information (Details) $ in Millions	Jun. 30, 2022 USD ($) option
Lessee, Lease, Description [Line Items]
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	$ 136.2
Operating lease, liability	$ 145.9
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	$ 20.8
Finance lease liability	21.1
Lessee, operating lease, right-of-use asset, lease not yet commenced	69.2
Lessee, operating lease, lease not yet commenced, liability	$ 90.6
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, number of options to renew | option	1
Lessee, finance lease, number of options to renew | option	1
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease not yet commenced, term of contract	16 years