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Commitments and Contingencies - Additional Information (Detail) - USD ($) | Sep. 30, 2021 | May 31, 2021
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Revolving Credit Facility | Line of Credit | Credit Agreement |  |
Loss Contingencies [Line Items] |  |
Unsecured revolving credit facility |  | $ 100,000,000
Borrowings under Credit Agreement | $ 0 |
Shari Dorff |  |
Loss Contingencies [Line Items] |  |
Loss contingency | $ 0 |

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