ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassification Adjustments Out of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Unrealized gains/(losses) on investments available-for-sale Affected line item in the Statements of Income:
Investment securities gains		$ 1,273	$ 150	$ 1,275	$ 1,919
Income before taxes		1,273	150	1,275	1,919
Tax expense		(508)	(60)	(508)	(765)
Net income				767	1,154
Amortization of defined benefit pension plan items Affected line item in the Statements of Income:
Recognized actuarial loss	[1]	$ (295)	$ (291)	(590)	(575)
Income before taxes				(590)	(575)
Tax expense				235	228
Net income/ (Loss)				$ (355)	$ (347)

[1] This amount is included in the computation of net periodic benefit cost, see Note 9.