INVESTMENT SECURITIES - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 9,732	$ 10,170
Gross Unrecognized Gains	400	205
Gross Unrecognized Losses	0	(26)
Estimated Fair Value	10,132	10,349
Residential mortgage backed securities ('MBS) and collateralized mortgage obligations (CMOs)
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	9,651	10,087
Gross Unrecognized Gains	400	205
Gross Unrecognized Losses	0	(26)
Estimated Fair Value	10,051	10,266
Fair Value
Less than 12 Months		0
12 Months or More		2,253
Total		2,253
Unrecognized Losses
Less than 12 Months		0
12 Months or More		(26)
Total		(26)
Other investments
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	81	83
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	0	0
Estimated Fair Value	$ 81	$ 83

Amount of investment in debt security measured at amortized cost (held-to-maturity).

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