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Fair Value of Assets and Liabilities - Narrative (Details) | Mar. 31, 2021 security
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Fair Value, Inputs, Level 1 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |
Fair value measurement, number of debt securities | 2
Fair Value, Inputs, Level 2 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |
Fair value measurement, number of debt securities | 5

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