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Investment Securities - Cost basis and fair values of investment securities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Information concerning investments with unrealized gains and losses |  |
Investment securities available for sale, Cost Basis | $ 162,219 | $ 139,684
Investment securities available for sale, Gross Unrealized Gains | 4,279 | 4,728
Investment securities available for sale, Gross Unrealized Losses | (655) | (247)
Available for Sale, Fair Value, Total | 165,843 | 144,165
Investment securities held to maturity, Cost Basis | 53,552 | 44,222
Investment securities held to maturity, Gross Unrealized Gains | 2,485 | 2,937
Investment securities held to maturity, Gross Unrealized Losses | (146) | (53)
Held to Maturity, Fair Value, Total | 55,891 | 47,106
U.S. Agency |  |
Information concerning investments with unrealized gains and losses |  |
Investment securities available for sale, Cost Basis | 6,725 | 2,971
Investment securities available for sale, Gross Unrealized Gains | 161 | 181
Available for Sale, Fair Value, Total | 6,886 | 3,152
Investment securities held to maturity, Cost Basis | 2,500 |
Investment securities held to maturity, Gross Unrealized Gains | 4 |
Held to Maturity, Fair Value, Total | 2,504 |
U.S. Agency mortgage-backed securities |  |
Information concerning investments with unrealized gains and losses |  |
Investment securities available for sale, Cost Basis | 83,598 | 65,398
Investment securities available for sale, Gross Unrealized Gains | 1,806 | 2,533
Investment securities available for sale, Gross Unrealized Losses | (580) | (18)
Available for Sale, Fair Value, Total | 84,824 | 67,913
Investment securities held to maturity, Cost Basis | 11,612 | 8,119
Investment securities held to maturity, Gross Unrealized Gains | 292 | 369
Investment securities held to maturity, Gross Unrealized Losses | (58) |
Held to Maturity, Fair Value, Total | 11,846 | 8,488
Municipal |  |
Information concerning investments with unrealized gains and losses |  |
Investment securities available for sale, Cost Basis | 19,358 | 19,000
Investment securities available for sale, Gross Unrealized Gains | 1,106 | 1,348
Investment securities available for sale, Gross Unrealized Losses | (12) |
Available for Sale, Fair Value, Total | 20,452 | 20,348
Investment securities held to maturity, Cost Basis | 31,931 | 30,076
Investment securities held to maturity, Gross Unrealized Gains | 2,101 | 2,455
Investment securities held to maturity, Gross Unrealized Losses | (86) | (49)
Held to Maturity, Fair Value, Total | 33,946 | 32,482
Corporate bonds |  |
Information concerning investments with unrealized gains and losses |  |
Investment securities available for sale, Cost Basis | 52,538 | 52,315
Investment securities available for sale, Gross Unrealized Gains | 1,206 | 666
Investment securities available for sale, Gross Unrealized Losses | (63) | (229)
Available for Sale, Fair Value, Total | 53,681 | 52,752
Corporate bonds and other securities |  |
Information concerning investments with unrealized gains and losses |  |
Investment securities held to maturity, Cost Basis | 7,509 | 6,027
Investment securities held to maturity, Gross Unrealized Gains | 88 | 113
Investment securities held to maturity, Gross Unrealized Losses | (2) | (4)
Held to Maturity, Fair Value, Total | $ 7,595 | $ 6,136

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