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, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Investment Securities
Less than 12 months Fair Value	$ 88,335	$ 25,212
Less than 12 months Unrealized Loss	(2,069)	(310)
12 months or more Fair Value	13,673	2,235
12 months or more Unrealized Loss	(586)	(26)
Total Fair Value	102,008	27,447
Total Unrealized Loss	$ (2,655)	$ (336)
Number of securities continuous unrealized loss position more than twelve months | security	146	49
Collateralized mortgage obligations
Investment Securities
Less than 12 months Fair Value	$ 6,747	$ 201
Less than 12 months Unrealized Loss	(126)
12 months or more Fair Value	953	1,188
12 months or more Unrealized Loss	(6)	(14)
Total Fair Value	7,700	1,389
Total Unrealized Loss	(132)	(14)
Agency mortgage-backed securities
Investment Securities
Less than 12 months Fair Value	9,738
Less than 12 months Unrealized Loss	(229)
12 months or more Fair Value	221	566
12 months or more Unrealized Loss	(6)	(10)
Total Fair Value	9,959	566
Total Unrealized Loss	(235)	(10)
Municipal securities
Investment Securities
Less than 12 months Fair Value	25,335	851
Less than 12 months Unrealized Loss	(642)	(2)
Total Fair Value	25,335	851
Total Unrealized Loss	(642)	(2)
Corporate securities
Investment Securities
Less than 12 months Fair Value	1,490
Less than 12 months Unrealized Loss	(10)
Total Fair Value	1,490
Total Unrealized Loss	(10)
U.S. Government agency securities
Investment Securities
Less than 12 months Fair Value	45,025	24,160
Less than 12 months Unrealized Loss	(1,062)	(308)
12 months or more Fair Value	12,499	481
12 months or more Unrealized Loss	(574)	(2)
Total Fair Value	57,524	24,641
Total Unrealized Loss	$ (1,636)	$ (310)