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Investment Securities - Cost basis and fair values of investment securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	$ 193,460	$ 161,416
Investment securities available for sale, Gross Unrealized Gains	50	3,167
Investment securities available for sale, Gross Unrealized Losses	(19,210)	(1,412)
Available for Sale, Fair Value, Total	174,300	163,171
Investment securities held to maturity, Cost Basis	62,567	53,751
Investment securities held to maturity, Gross Unrealized Gains	17	2,001
Investment securities held to maturity, Gross Unrealized Losses	(6,796)	(236)
Held to Maturity, Fair Value, Total	55,788	55,516
U.S. Agency
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	11,349	7,371
Investment securities available for sale, Gross Unrealized Gains		86
Investment securities available for sale, Gross Unrealized Losses	(1,312)	(70)
Available for Sale, Fair Value, Total	10,037	7,387
Investment securities held to maturity, Cost Basis	2,500	2,500
Investment securities held to maturity, Gross Unrealized Losses	(439)	(11)
Held to Maturity, Fair Value, Total	2,061	2,489
U.S. Agency mortgage-backed securities
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	101,389	80,136
Investment securities available for sale, Gross Unrealized Gains	14	1,202
Investment securities available for sale, Gross Unrealized Losses	(13,377)	(1,171)
Available for Sale, Fair Value, Total	88,026	80,167
Investment securities held to maturity, Cost Basis	19,354	10,556
Investment securities held to maturity, Gross Unrealized Gains	11	203
Investment securities held to maturity, Gross Unrealized Losses	(2,343)	(115)
Held to Maturity, Fair Value, Total	17,022	10,644
Municipal
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	21,438	20,066
Investment securities available for sale, Gross Unrealized Gains		851
Investment securities available for sale, Gross Unrealized Losses	(1,799)	(25)
Available for Sale, Fair Value, Total	19,639	20,892
Investment securities held to maturity, Cost Basis	34,206	33,188
Investment securities held to maturity, Gross Unrealized Gains	6	1,734
Investment securities held to maturity, Gross Unrealized Losses	(3,818)	(103)
Held to Maturity, Fair Value, Total	30,394	34,819
Corporate bonds.
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	59,284	53,843
Investment securities available for sale, Gross Unrealized Gains	36	1,028
Investment securities available for sale, Gross Unrealized Losses	(2,722)	(146)
Available for Sale, Fair Value, Total	56,598	54,725
Corporate bonds and other securities
Information concerning investments with unrealized gains and losses
Investment securities held to maturity, Cost Basis	6,507	7,507
Investment securities held to maturity, Gross Unrealized Gains		64
Investment securities held to maturity, Gross Unrealized Losses	(196)	(7)
Held to Maturity, Fair Value, Total	$ 6,311	$ 7,564

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