Goodwill Other Intangible Assets and Other Long Term Assets - Summary of Other Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 43,641	$ 13,684
Less: accumulated amortization	(3,928)	(2,798)
Intangible assets, net	39,713	10,886
Trade names - Iindefinite-lived [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	17,712	7,736
Other Intangible Assets, Primarily Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 25,929	$ 5,948