ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassification Adjustments Out of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Unrealized gains/(losses) on investments available-for-sale Affected line item in the Statements of Income:
Investment securities gains		$ 63	$ 2
Income before taxes		63	2
Tax expense		16	0
Net income		47	2
Amortization of defined benefit pension plan items Affected line item in the Statements of Income:
Recognition of unrealized gain (loss)	[1]	(250)	(295)
Income before taxes		(250)	(295)
Tax expense		(119)	(117)
Net income/ (Loss)		$ (131)	$ (178)

[1] This amount is included in the computation of net periodic benefit cost, see Note 10.