Premises and Equipment - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Total premises and equipment	$ 17,222	$ 15,269
Accumulated depreciation	(11,844)	(10,869)
Total premises and equipment, net	5,378	4,400
Leasehold improvements
Property Plant And Equipment [Line Items]
Total premises and equipment	9,013	7,998
Furniture and fixtures
Property Plant And Equipment [Line Items]
Total premises and equipment	4,695	3,983
Equipment and others
Property Plant And Equipment [Line Items]
Total premises and equipment	$ 3,514	$ 3,288