ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclassification Adjustments Out of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Unrealized gains/(losses) on investments available-for-sale Affected line item in the Statements of Income:
Investment securities gains		$ 0	$ 0	$ 1,275	$ 1,919
Income before taxes		0	0	1,275	1,919
Tax expense		0	0	(508)	(765)
Net income				767	1,154
Amortization of defined benefit pension plan items Affected line item in the Statements of Income:
Recognition of unrealized loss	[1]	$ (296)	$ (295)
Income before taxes				(886)	(870)
Tax expense				364	339
Net income/ (Loss)				$ (522)	$ (531)

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