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Investment Securities Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Schedule of Held-to-maturity Securities [Line Items] |  |
Due within 1 year | $ 2,887 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 2,904 |
Due after 1 but within 5 years | 5,117 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value | 5,179 |
Due after 5 but within 10 years | 45,774 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | 44,717 |
Due after 10 years | 3,801 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value | 3,774 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost | 57,579 |
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value | 56,574 |
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost | 350,254 |
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value | 351,544 |
Debt Securities, Held-to-maturity | 407,833 | $ 361,844
Securities held to maturity, fair value | 408,118 | $ 369,851
US Government Agencies Residential Mortgage-backed Securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 61,200 |
Securities held to maturity, fair value | 61,800 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity | 289,100 |
Securities held to maturity, fair value | $ 289,800 |

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