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Loans - Recorded Investment in Residential, Consumer and Credit Card Loans Based on Payment Activity (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment | $ 3,337,449 | $ 2,804,035 | $ 2,784,562
Credit Card, Consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment | 8,115 |  |
Residential Real Estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  | 814,030 | 814,030
Consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | 124,785
Credit Cards |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  | $ 7,569 | 7,569
Performing | Credit Card, Consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment | 8,081 |  |
Performing | Residential Real Estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | 809,247
Performing | Consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | 123,950
Performing | Credit Cards |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | 7,567
Nonperforming | Credit Card, Consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment | $ 34 |  |
Nonperforming | Residential Real Estate |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | 4,783
Nonperforming | Consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | 835
Nonperforming | Credit Cards |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount of recorded investment |  |  | $ 2

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