OTHER COMPREHENSIVE INCOME (LOSS) (Reclassification Adjustments Out of Accumulated Other Comprehensive Income) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Unrealized gains/(losses) on investments available-for-sale Affected line item in the Statements of Income:
Investment securities gains		$ 2	$ 1,769
Income before taxes		2	1,769
Tax expense		0	705
Net income		2	1,064
Amortization of defined benefit pension plan items Affected line item in the Statements of Income:
Recognized actuarial loss	[1]	(295)	(284)
Income before taxes		(295)	(284)
Tax expense		(117)	(113)
Net income		$ (178)	$ (171)

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