QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Quarterly financial data
Interest Income	$ 11,481	$ 11,512	$ 11,360	$ 11,179	$ 11,121	$ 10,741	$ 10,550	$ 10,220	$ 45,532	$ 42,632
Net Interest Income	9,241	9,310	9,059	8,939	9,061	8,942	9,033	8,794	36,549	35,830
Net Income	$ 3,489	$ 3,616	$ 3,237	$ 2,811	$ 2,936	$ 3,278	$ 3,068	$ 3,148	$ 13,153	$ 12,430
Basic earnings per share (in dollars per share)	$ 0.59	$ 0.61	$ 0.54	$ 0.47	$ 0.49	$ 0.55	$ 0.52	$ 0.53	$ 2.21	$ 2.09
Diluted earnings per share (in dollars per share)	$ 0.59	$ 0.61	$ 0.54	$ 0.47	$ 0.49	$ 0.55	$ 0.52	$ 0.53	$ 2.21	$ 2.09
Loss on bank premises									$ 12	$ (9)