Recent Accounting Pronouncements - Additional Information (Detail)	Apr. 10, 2023	Sep. 30, 2024
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Captives provision existence period	10 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of captive claims listed transaction loss ratio	65.00%
Percentage of captive claims transaction of interest loss ratio	70.00%
ASU 2023-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jan. 01, 2024
Change in accounting principle, accounting standards update, immaterial effect [true false]		true