SECURITIES - Gross unrealized losses aggregated by category (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) security	Dec. 31, 2019 USD ($)
Marketable Securities [Line Items]
Number of debt securities with unrealized loss | security	10
Amortized cost of securities with unrealized losses	$ 32,200
Aggregate depreciation of securities with unrealized losses (as a percent)	0.33%
Continuous unrealized losses, Gross Unrealized Losses, Available-for-Sale
Less than Twelve Months		$ 172
Twelve Months and Over		124
Continuous unrealized losses, Fair Value, Available-for-Sale
Less Than Twelve Months		52,191
Twelve Months and Over		8,781
U.S. government agency and government-sponsored residential mortgage-backed securities
Continuous unrealized losses, Gross Unrealized Losses, Available-for-Sale
Less than Twelve Months	$ 89	147
Twelve Months and Over	17	118
Continuous unrealized losses, Fair Value, Available-for-Sale
Less Than Twelve Months	27,881	47,343
Twelve Months and Over	$ 4,224	7,986
Continuous unrealized losses, Gross Unrealized Losses, Held-to-Maturity
Twelve Months and Over		6
Continuous unrealized losses, Fair Value, Held-for-Maturity
Twelve Months and Over		2,538
U.S. government-sponsored collateralized mortgage obligations
Continuous unrealized losses, Gross Unrealized Losses, Available-for-Sale
Less than Twelve Months		1
Twelve Months and Over		6
Continuous unrealized losses, Fair Value, Available-for-Sale
Less Than Twelve Months		884
Twelve Months and Over		795
SBA asset-backed securities
Continuous unrealized losses, Gross Unrealized Losses, Available-for-Sale
Less than Twelve Months		24
Continuous unrealized losses, Fair Value, Available-for-Sale
Less Than Twelve Months		$ 3,964