Investment securities (Details 1) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Less Than 12 Months, Fair Value	$ 324,100	$ 224,680
Less Than 12 Months, Unrealized Losses	35,275	4,548
12 Months Or More, Fair Value	56,712	28,817
12 Months Or More, Unrealized Losses	8,308	988
Total, Fair Value	380,812	253,497
Total, Unrealized Losses	43,583	5,536
U.S. Government Sponsored Enterprises
Less Than 12 Months, Fair Value	5,261	5,232
Less Than 12 Months, Unrealized Losses	337	15
12 Months Or More, Fair Value	7,432	3,263
12 Months Or More, Unrealized Losses	162	170
Total, Fair Value	12,693	8,495
Total, Unrealized Losses	499	185
Mortgage-backed securities
Less Than 12 Months, Fair Value	179,160	131,483
Less Than 12 Months, Unrealized Losses	12,653	2,477
12 Months Or More, Fair Value	34,152	19,632
12 Months Or More, Unrealized Losses	3,590	542
Total, Fair Value	213,312	151,115
Total, Unrealized Losses	16,243	3,019
State and political subdivisions
Less Than 12 Months, Fair Value	129,621	80,076
Less Than 12 Months, Unrealized Losses	21,403	1,981
12 Months Or More, Fair Value	15,128	5,922
12 Months Or More, Unrealized Losses	4,556	276
Total, Fair Value	144,749	85,998
Total, Unrealized Losses	25,959	2,257
US Treasury Securities [Member]
Less Than 12 Months, Fair Value	10,058	7,889
Less Than 12 Months, Unrealized Losses	882	75
12 Months Or More, Fair Value	0	0
12 Months Or More, Unrealized Losses	0	0
Total, Fair Value	10,058	7,889
Total, Unrealized Losses	$ 882	$ 75