ACCUMULATED OTHER COMPREHENSIVE INCOME, CHANGES IN AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	$ 140,108	$ 125,695
Before reclassifications	(2,141)	(222)
Reclassifications	(712)	(327)
Balance at end of year	142,944	140,108
Unrealized Gains and Losses on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	469	1,126
Before reclassifications	(2,390)	(330)
Reclassifications	(712)	(327)
Balance at end of year	(2,633)	469
Changes in Pension Plan Assets and Benefit Obligations
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	(233)	(341)
Before reclassifications	249	108
Reclassifications	0	0
Balance at end of year	16	(233)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of year	236	785
Balance at end of year	$ (2,617)	$ 236