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Borrowed Funds - Scheduled Securities Sold Under Repurchase Agreements (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Due after three years through four years | $ 0 |
Due after four years through five years | 0 |
Securities sold under repurchase agreements | 99,936 | $ 60,737
Securities Sold Under Repurchase Agreements |  |
Debt Instrument [Line Items] |  |
Due in one year or less | 99,936 |
Due after one year through two years | 0 |
Due after two years through three years | 0 |
Thereafter | 0 |
Securities sold under repurchase agreements | $ 99,936 |

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