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Fair Value of Assets and Liabilities - Narrative (Details) | Dec. 31, 2020 security
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Quoted Prices in Active Markets for Identical Assets (Level 1) |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |
Number of debt securities | 2
Significant Other Observable Inputs (Level 2) |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |
Number of debt securities | 4

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