PREMISES AND EQUIPMENT, NET - Cost and accumulated depreciation of premises and equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
PREMISES AND EQUIPMENT, NET
Gross premise and equipment	$ 38,125	$ 35,864
Less: accumulated depreciation	(12,869)	(10,746)
Premises and equipment, net	25,256	25,118
Depreciation	2,200	1,800
Building and building improvements
PREMISES AND EQUIPMENT, NET
Gross premise and equipment	12,190	12,190
Leasehold improvements, including artwork
PREMISES AND EQUIPMENT, NET
Gross premise and equipment	14,336	12,879
Land
PREMISES AND EQUIPMENT, NET
Gross premise and equipment	4,980	4,980
Equipment and software
PREMISES AND EQUIPMENT, NET
Gross premise and equipment	$ 6,619	$ 5,815