DERIVATIVES - (Schedule of Information about Interest Rate Swaps Designated as Cash Flow Hedges) (Parenthetical) (Details) - Loan Level Swaps [Member] - Not Designated as Hedging Instrument [Member] $ in Millions	Sep. 30, 2021 USD ($)
Derivative [Line Items]
Derivative assets	$ 43.1
Accrued interest payable	$ 4.7

DERIVATIVES - (Schedule of Information about Interest Rate Swaps Designated as Cash Flow Hedges) (Parenthetical) (Details) - Loan Level Swaps [Member] - Not Designated as Hedging Instrument [Member]
$ in Millions

Sep. 30, 2021

USD ($)

Derivative assets

$ 43.1

Accrued interest payable

$ 4.7