ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Activity in accumulated other comprehensive income (loss) [Roll Forward]
Balance	$ 100,044	$ 92,298	$ 92,298
Current period other comprehensive income/(loss)	(1,811)	(26)	(1,448)
Balance	101,064		100,044
Unrealized Gains (Losses) on Securities [Member]
Activity in accumulated other comprehensive income (loss) [Roll Forward]
Balance	(2,997)	(1,678)	(1,678)
Current period other comprehensive income/(loss)	(1,811)	20
Balance	(4,808)	(1,658)	(2,997)
Officers' Retirement Plan [Member]
Activity in accumulated other comprehensive income (loss) [Roll Forward]
Balance	(1,403)	(686)	(686)
Current period other comprehensive income/(loss)	0	(46)
Balance	(1,403)	(732)	(1,403)
Directors' Retirement Plan [Member]
Activity in accumulated other comprehensive income (loss) [Roll Forward]
Balance	3	14	14
Current period other comprehensive income/(loss)	0	0
Balance	3	14	3
Accumulated Other Comprehensive Loss [Member]
Activity in accumulated other comprehensive income (loss) [Roll Forward]
Balance	(4,397)	(2,350)	(2,350)
Current period other comprehensive income/(loss)	(1,811)		(1,448)
Balance	$ (6,208)	$ (2,376)	$ (4,397)