Investment securities (Details 2) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized Cost
Due Within One Year	$ 2,608
Due From One To Five Years	11,047
Due From Five To Ten Years	83,496
Due After Ten Years	100,799
Mortgage-backed Securities	233,773
Total	431,723	$ 406,422
Estimated Fair Value
Due Within One Year	2,623
Due From One To Five Years	11,150
Due From Five To Ten Years	80,272
Due After Ten Years	89,337
Mortgage-backed Securities	224,655
Total	$ 408,037