INVESTMENT SECURITIES - Gross Unrealized Losses and Fair Value Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Investment Securities
Less than 12 months Fair Value	$ 11,149	$ 18,186
Less than 12 months Unrealized Loss	(30)	(340)
12 months or more Fair Value	23,133	50,327
12 months or more Unrealized Loss	(286)	(1,741)
Total Fair Value	34,282	68,513
Total Unrealized Loss	$ (316)	$ (2,081)
Number of securities continuous unrealized loss position more than twelve months | security	87	142
Collateralized mortgage obligations
Investment Securities
Less than 12 months Fair Value	$ 7,043	$ 1,625
Less than 12 months Unrealized Loss	(18)	(22)
12 months or more Fair Value	8,039	17,546
12 months or more Unrealized Loss	(123)	(640)
Total Fair Value	15,082	19,171
Total Unrealized Loss	(141)	(662)
Agency mortgage-backed securities
Investment Securities
Less than 12 months Fair Value	1,853	3,399
Less than 12 months Unrealized Loss	(4)	(74)
12 months or more Fair Value	12,723	21,417
12 months or more Unrealized Loss	(154)	(840)
Total Fair Value	14,576	24,816
Total Unrealized Loss	(158)	(914)
Municipal securities
Investment Securities
Less than 12 months Fair Value	2,253	13,162
Less than 12 months Unrealized Loss	(8)	(244)
12 months or more Fair Value	871	8,415
12 months or more Unrealized Loss	(8)	(210)
Total Fair Value	3,124	21,577
Total Unrealized Loss	(16)	(454)
U.S. Government agency securities
Investment Securities
12 months or more Fair Value	500	1,959
12 months or more Unrealized Loss		(40)
Total Fair Value	500	1,959
Total Unrealized Loss		(40)
U.S. Treasury securities
Investment Securities
12 months or more Fair Value	1,000	990
12 months or more Unrealized Loss	(1)	(11)
Total Fair Value	1,000	990
Total Unrealized Loss	$ (1)	$ (11)