ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in Accumulated Other Comprehensive Income By Component) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized Gains and Losses on Available- for-Sales Securities, Opening Balance	$ (722)	$ 3,836
Unrealized Gains and Losses on Available- for-Sales Securities, Other comprehensive income before reclassification	1,525	(4,518)
Unrealized Gains and Losses on Available- for-Sales Securities, Amounts reclassified from accumulated other comprehensive income (loss)	(19)	(40)
Unrealized Gains and Losses on Available- for-Sales Securities, Net current period other comprehensive income	1,506	(4,558)
Unrealized Gains and Losses on Available- for-Sales Securities, Ending Balance	784	(722)	$ 3,836
Defined Benefit Pension Items, Opening Balance	(1,665)	(1,694)
Defined Benefit Pension Items, Other comprehensive income before reclassification	50	(101)
Defined Benefit Pension Items, Amounts reclassified from accumulated other comprehensive income (loss)	161	130
Defined Benefit Pension Items, Net current period other comprehensive income	211	29	(57)
Defined Benefit Pension Items, Ending Balance	(1,454)	(1,665)	(1,694)
Total, Opening Balance	(2,387)	2,142
Other comprehensive income (loss) before reclassification	1,575	(4,619)
Amounts reclassified from accumulated other comprehensive income (loss)	142	90
Total, Net current period other comprehensive income	1,717	(4,529)	(1,688)
Total, Ending Balance	$ (670)	$ (2,387)	$ 2,142