Investment Securities - Unrealized loss positions (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Marketable securities - Fair Value
Less than 12 months	$ 84,785	$ 62,998
12 months or more	46,427	13,746
Total	131,212	76,744
Marketable securities - Unrealized Loss
Less than 12 months	9,160	842
12 months or more	10,486	452
Total	19,646	1,294
Obligations of U.S. Government agencies
Debt securities - Fair Value
Less than 12 months	11,175	1,289
12 months or more	2,327	2,397
Total	13,502	3,686
Debt securities - Unrealized Loss
Less than 12 months	988	35
12 months or more	677	107
Total	1,665	142
Obligations of States and political subdivisions
Debt securities - Fair Value
Less than 12 months	24,728	2,473
12 months or more	891
Total	25,619	2,473
Debt securities - Unrealized Loss
Less than 12 months	3,085	63
12 months or more	390
Total	3,475	63
Mortgage-backed securities
Debt securities - Fair Value
Less than 12 months	46,727	59,236
12 months or more	43,209	11,349
Total	89,936	70,585
Debt securities - Unrealized Loss
Less than 12 months	5,025	744
12 months or more	9,419	345
Total	14,444	$ 1,089
Subordinated debt investments
Debt securities - Fair Value
Less than 12 months	2,155
Total	2,155
Debt securities - Unrealized Loss
Less than 12 months	62
Total	$ 62