SECURITIES - Summary of amortized cost of securities held to maturity and their estimated fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 29,838	$ 23,281
Gross Unrecognized Gains	1	0
Gross Unrecognized Losses	(1,846)	(432)
Estimated Fair Value	27,993	22,849
Asset-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	15,238	15,281
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	(1,306)	(373)
Estimated Fair Value	13,932	14,908
Corporate Bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	14,600	8,000
Gross Unrecognized Gains	1	0
Gross Unrecognized Losses	(540)	(59)
Estimated Fair Value	$ 14,061	$ 7,941