FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK AND DERIVATIVES (Company's Interest Rate Swaps) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Swap
Derivative [Line Items]
Notional Amount	$ 17,788	$ 18,866
Estimated Fair Value	$ 0	$ 0
Years to Maturity	5 years 2 months	6 years 4 months
Derivative Receive Rate	3.98%	3.62%
Derivative Pay Rate	3.98%	3.62%
Pay Fixed/Receive Variable Swaps
Derivative [Line Items]
Notional Amount	$ 8,894	$ 9,433
Estimated Fair Value	$ (707)	$ (1,010)
Years to Maturity	5 years 2 months	6 years 4 months
Derivative Receive Rate	2.54%	1.86%
Derivative Pay Rate	5.42%	5.38%
Pay Variable/Receive Fixed Swaps
Derivative [Line Items]
Notional Amount	$ 8,894	$ 9,433
Estimated Fair Value	$ 707	$ 1,010
Years to Maturity	5 years 2 months	6 years 4 months
Derivative Receive Rate	5.42%	5.38%
Derivative Pay Rate	2.54%	1.86%