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Securities - Schedule of Amortized Cost and Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | --- | ---
Available for Sale Amortized Cost |  |  |
1 year or less | $ 29,292 |  |
Over 1 year through 5 years | 67,854 |  |
Over 5 years through 10 years | 136,154 |  |
Over 10 years | 47,527 |  |
Without single maturity date | 132,074 |  |
Available for Sale, Amortized Cost | 412,901 | $ 331,745 |
Available for Sale Fair Value |  |  |
1 year or less | 29,505 |  |
Over 1 year through 5 years | 68,105 |  |
Over 5 years through 10 years | 134,047 |  |
Over 10 years | 47,020 |  |
Without single maturity date | 132,999 |  |
Available for Sale, Fair Value | 411,676 | 337,718 | $ 313,671
Held-to-Maturity Amortized Cost |  |  |
1 year or less | 0 |  |
Over 1 year through 5 years | 0 |  |
Over 5 years through 10 years | 0 |  |
Over 10 years | 0 |  |
Without single maturity date | 7,220 |  |
Held to Maturity, Amortized Cost | 7,220 | 10,294 | 13,606
Held-to-Maturity Fair Value |  |  |
1 year or less | 0 |  |
Over 1 year through 5 years | 0 |  |
Over 5 years through 10 years | 0 |  |
Over 10 years | 0 |  |
Without single maturity date | 7,482 |  |
Held to Maturity, Fair Value | 7,482 | 10,768 | $ 14,110
Mortgage-backed securities, residential |  |  |
Available for Sale Amortized Cost |  |  |
Available for Sale, Amortized Cost | 132,074 | 105,327 |
Available for Sale Fair Value |  |  |
Available for Sale, Fair Value | 132,999 | 108,822 |
Held-to-Maturity Amortized Cost |  |  |
Held to Maturity, Amortized Cost | 7,220 | 10,294 |
Held-to-Maturity Fair Value |  |  |
Held to Maturity, Fair Value | $ 7,482 | $ 10,768 |

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