SECURITIES - Contractual maturity (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security	Dec. 31, 2017 USD ($)	Feb. 29, 2020 USD ($)
Amortized Cost-Available-for-Sale
After 1 year through 5 years	$ 5,000
After 5 years through 10 years	9,994
Total for contractual maturity	14,994
Amortized Cost	237,574	$ 212,316
Fair Value-Available-for-Sale
After 1 year through 5 years	5,067
After 5 years through 10 years	10,137
Total for contractual maturity	15,204
Total	239,473	209,293
Amortized Cost-Held-to-Maturity
After 1 year through 5 years	500
After 5 years through 10 years	659
Over 10 years	5,790
Total for contractual maturity	6,949
Amortized Cost	26,372	44,688		$ 21,500
Fair Value-Held-to-Maturity
After 1 year through 5 years	501
After 5 years through 10 years	761
Over 10 years	5,969
Total for contractual maturity	7,231
Total	26,927	44,706		$ 22,100
Sales
Proceeds	28,391
Proceeds		1,015
Gross gains	1,267	5
Calls
Proceeds	28,145	$ 1,025	$ 400
Gross gains	$ 77
Interest rate swaps | Mortgage-backed securities
Accelerated Share Repurchases [Line Items]
Number of securities pledged | security	7	0
Pledged as collateral	$ 15,700
Minimum
Fair Value-Held-to-Maturity
Maturity period	2 years
Maximum
Fair Value-Held-to-Maturity
Maturity period	30 years
U.S. government agency and government-sponsored residential mortgage-backed securities
Amortized Cost-Available-for-Sale
No single maturity date	$ 163,982
Amortized Cost	163,982	$ 105,340
Fair Value-Available-for-Sale
No single maturity date	165,173
Total	165,173	104,017
Amortized Cost-Held-to-Maturity
No single maturity date	12,682
Amortized Cost	12,682	15,025
Fair Value-Held-to-Maturity
No single maturity date	12,762
Total	12,762	14,607
U.S. government-sponsored collateralized mortgage obligations
Amortized Cost-Available-for-Sale
No single maturity date	26,137
Amortized Cost	26,137	31,293
Fair Value-Available-for-Sale
No single maturity date	26,373
Total	26,373	30,928
Amortized Cost-Held-to-Maturity
No single maturity date	1,433
Amortized Cost	1,433	1,724
Fair Value-Held-to-Maturity
No single maturity date	1,502
Total	1,502	1,753
SBA asset-backed securities
Amortized Cost-Available-for-Sale
No single maturity date	32,461
Amortized Cost	32,461	47,686
Fair Value-Available-for-Sale
No single maturity date	32,723
Total	32,723	46,807
Amortized Cost-Held-to-Maturity
No single maturity date	5,308
Amortized Cost	5,308	5,818
Fair Value-Held-to-Maturity
No single maturity date	5,432
Total	$ 5,432	$ 5,819