Premises and equipment, net - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Premises and equipment, net
Gross premises and equipment	$ 100,022	$ 91,773
Less: accumulated depreciation	38,746	36,106
Net premises and equipment	61,276	55,667
Land
Premises and equipment, net
Gross premises and equipment	7,302	7,302
Premises and leasehold improvements
Premises and equipment, net
Gross premises and equipment	60,266	55,865
Right-of-use assets
Premises and equipment, net
Gross premises and equipment	10,576	7,980
Furniture, fixtures and equipment
Premises and equipment, net
Gross premises and equipment	$ 21,878	$ 20,626