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Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Investment Securities [Abstract] |  |
Available for sale, Amortized Cost, Due after one year through five years | $ 799 |
Available for sale, Amortized Cost, Due after five years through ten years | 51,665 |
Available for sale, Amortized Cost, Due after ten years | 52,347 |
Available-for-sale securities, Amortized Cost | 104,811 | $ 137,465
Available for sale, Estimated Fair Value, Due after one year through five years | 825 |
Available for sale, Estimated Fair Value, Due after five years through ten years | 52,410 |
Available for sale, Estimated Fair Value, Due after ten years | 51,890 |
Available-for-sale Securities, Debt Securities, Total | 105,125 | 139,568
Held to maturity securities, Amortized Cost, Due in one year or less | 2,921 |
Held to maturity securities, Amortized Cost, Due after one year through five years | 9,982 |
Held to maturity securities, Amortized Cost, Due after five years through ten years | 55,874 |
Held to maturity securities, Amortized Cost, Due after ten years | 181,724 |
Held-to-maturity Securities, Amortized Cost | 250,501 | 65,706
Held to maturity securities, Estimated Fair Value, Due in one year or less | 2,954 |
Held to maturity securities, Estimated Fair Value, Due after one year through five years | 9,959 |
Held to maturity securities, Estimated Fair Value, Due after five years through ten years | 55,560 |
Held to maturity securities, Estimated Fair Value, Due after ten years | 179,362 |
Held-to-maturity Securities, Fair Value, Total | $ 247,835 | $ 65,828

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563 + Details
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