FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK AND DERIVATIVES (Company's Interest Rate Swaps) (Detail) - Swap - Commercial Loan [Member] - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 17.2	$ 17.8
Estimated Fair Value	$ 0.4	$ 0.7