Investment Securities - Unrealized loss positions (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Marketable securities - Fair Value
Less than 12 months	$ 107,594	$ 62,998
12 months or more	23,117	13,746
Total	130,711	76,744
Marketable securities - Unrealized Loss
Less than 12 months	9,897	842
12 months or more	4,104	452
Total	14,001	1,294
Obligations of U.S. Government agencies
Debt securities - Fair Value
Less than 12 months	6,707	1,289
12 months or more	2,519	2,397
Total	9,226	3,686
Debt securities - Unrealized Loss
Less than 12 months	523	35
12 months or more	486	107
Total	1,009	142
Obligations of States and political subdivisions
Debt securities - Fair Value
Less than 12 months	13,835	2,473
12 months or more	376
Total	14,211	2,473
Debt securities - Unrealized Loss
Less than 12 months	1,830	63
12 months or more	134
Total	1,964	63
Mortgage-backed securities
Debt securities - Fair Value
Less than 12 months	86,319	59,236
12 months or more	20,222	11,349
Total	106,541	70,585
Debt securities - Unrealized Loss
Less than 12 months	7,527	744
12 months or more	3,484	345
Total	11,011	$ 1,089
Subordinated debt investments
Debt securities - Fair Value
Less than 12 months	733
Total	733
Debt securities - Unrealized Loss
Less than 12 months	17
Total	$ 17