Short-term borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Short-term borrowings
Ending Balance	$ 114,930
Average Balance	42,680
Maximum Month-End Balance	$ 142,075
Weighted Average Rate for the Year	2.58%
Weighted Average Rate at End of Year	4.43%
Other borrowings
Short-term borrowings
Ending Balance	$ 14,530
Average Balance	10,033
Maximum Month-End Balance	$ 16,100
Weighted Average Rate for the Year	2.10%
Weighted Average Rate at End of Year	4.33%
FHLB Advances
Short-term borrowings
Ending Balance	$ 100,400		$ 50,000
Average Balance	32,647	$ 13,973	83,716
Maximum Month-End Balance	$ 125,975	$ 50,000	$ 179,199
Weighted Average Rate for the Year	2.73%	0.56%	1.01%
Weighted Average Rate at End of Year	4.45%		0.40%