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Investment Securities - Total investment securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	$ 5,395
Available for Sale, Cost Basis, After 1 year but within 5 years	46,169
Available for Sale, Cost Basis, After 5 years but within 10 years	46,884
Available for Sale, Cost Basis, Over 10 years	96,530
Investment securities available for sale, Cost Basis	194,978	$ 198,417
Available for Sale, Fair Value, Within 1 year	5,267
Available for Sale, Fair Value, After 1 year but within 5 years	43,751
Available for Sale, Fair Value, After 5 years but within 10 years	39,898
Available for Sale, Fair Value, Over 10 years	80,136
Available for Sale, Fair Value, Total	169,052	179,508
Held to Maturity, Cost Basis, Within 1 year	2,579
Held to Maturity, Cost Basis, After 1 year but within 5 years	14,096
Held to Maturity, Cost Basis, After 5 years but within 10 years	22,916
Held to Maturity, Cost Basis, Over 10 years	20,692
Investment securities held to maturity, Cost Basis	60,283	61,878
Held to Maturity, Fair Value, Within 1 year	2,513
Held to Maturity, Fair Value, After 1 year but within 5 years	13,137
Held to Maturity, Fair Value, After 5 years but within 10 years	19,404
Held to Maturity, Fair Value, Over 10 years	17,337
Held to Maturity, Fair Value, Total	$ 52,391	$ 55,192

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