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Borrowed Funds (FHLB Borrowings, Bank Notes, Senior Debt and Subordinated Debt) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Borrowed Funds | $ 37,195,000 | $ 60,263,000
Total FHLB, Senior and Sub Debt | 34,174,000 | 51,485,000
Parent Company |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | 10,583,000 | 9,825,000
Bank |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | 23,591,000 | 41,660,000
Senior Notes | Parent Company |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | 9,573,000 | 8,843,000
Senior Notes | Bank |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | $ 14,698,000 | 20,167,000
Senior Notes | Maximum | Parent Company |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 3.50% |
Senior Notes | Maximum | Bank |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 3.50% |
Senior Notes | Minimum | Parent Company |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 2.20% |
Senior Notes | Minimum | Bank |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 0.00% |
Subordinated Debt | Parent Company |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | $ 805,000 | 777,000
Stated interest rate | 3.90% |
Subordinated Debt | Bank |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | $ 5,393,000 | 5,152,000
Subordinated Debt | Maximum | Bank |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 4.20% |
Subordinated Debt | Minimum | Bank |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 2.70% |
Junior Subordinated Debt | Parent Company |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | $ 205,000 | 205,000
Stated interest rate | 0.80% |
FHLB | Bank |  |
Debt Instrument [Line Items] |  |
Borrowed Funds | $ 3,500,000 | $ 16,341,000
FHLB | Maximum | Bank |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 0.59% |
FHLB | Minimum | Bank |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 0.32% |

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