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Commitments and Contingencies (Detail)
$ in Millions
Mar. 31, 2024
USD ($)
Reinsurance Contracts: 2024 Reinsurance Contract  
Reinsurance Retention Policy [Line Items]  
Reinsurance payable, due in fiscal year $ 72.7
Reinsurance Contracts: 2025 Reinsurance Contract  
Reinsurance Retention Policy [Line Items]  
Reinsurance payable, due in second year $ 52.6