ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in Accumulated Other Comprehensive Income By Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized Gains and Losses on Available- for-Sales Securities, Opening Balance	$ 784	$ (722)
Unrealized Gains and Losses on Available- for-Sales Securities, Other comprehensive income before reclassification	(7,132)	448
Unrealized Gains and Losses on Available- for-Sales Securities, Amounts reclassified from accumulated other comprehensive income (loss)	6	(3)
Unrealized Gains and Losses on Available- for-Sales Securities, Net current period other comprehensive income	(7,126)	445
Unrealized Gains and Losses on Available- for-Sales Securities, Ending Balance	(6,270)	(277)
Defined Benefit Pension Items, Opening Balance	(1,454)	(1,665)
Defined Benefit Pension Items, Other comprehensive income before reclassification	0	0
Defined Benefit Pension Items, Amounts reclassified from accumulated other comprehensive income (loss)	49	40
Defined Benefit Pension Items, Net current period other comprehensive income	49	40
Defined Benefit Pension Items, Ending Balance	(1,718)	(1,625)
Total, Opening Balance	(670)	(2,387)
Total, Other comprehensive income before reclassification	(7,132)	448
Total, Amounts reclassified from accumulated other comprehensive income (loss)	55	37
Total, Net current period other comprehensive income	(7,077)	485
Total, Ending Balance	(7,988)	$ (1,902)
Accounting Standards Update 2018-02 [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	140
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(313)
Other Comprehensive Income Loss, Adjustment, Net of Tax	(173)
Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(68)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	0
Other Comprehensive Income Loss, Adjustment, Net of Tax	$ (68)