ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in Accumulated Other Comprehensive Income By Component) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized Gains and Losses on Available- for-Sales Securities, Opening Balance			$ (722)	$ 3,836	$ 3,836
Unrealized Gains and Losses on Available- for-Sales Securities, Other comprehensive income before reclassification			2,749		(4,518)
Unrealized Gains and Losses on Available- for-Sales Securities, Amounts reclassified from accumulated other comprehensive income (loss)			(31)		(40)
Unrealized Gains and Losses on Available- for-Sales Securities, Net current period other comprehensive income			2,718		(4,558)
Unrealized Gains and Losses on Available- for-Sales Securities, Ending Balance	$ 1,996		1,996		(722)
Defined Benefit Pension Items, Opening Balance			(1,665)	(1,694)	(1,694)
Defined Benefit Pension Items, Other comprehensive income before reclassification			0		(101)
Defined Benefit Pension Items, Amounts reclassified from accumulated other comprehensive income (loss)			121		130
Defined Benefit Pension Items, Net current period other comprehensive income	40	$ 32	121	97	29
Defined Benefit Pension Items, Ending Balance	(1,544)		(1,544)		(1,665)
Total, Opening Balance			(2,387)	2,142	2,142
Other comprehensive income (loss) before reclassification			2,749		(4,619)
Amounts reclassified from accumulated other comprehensive income (loss)			90		90
Total, Net current period other comprehensive income	83	$ (2,173)	2,839	$ 5,850	(4,529)
Total, Ending Balance	$ 452		$ 452		$ (2,387)