Commitments and Contingencies - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Jul. 31, 2022	Oct. 31, 2021
Loss Contingencies [Line Items]
Contingent liability under purchase agreements for future chassis inventory purchases	$ 5,400,000	$ 13,900,000
Repurchase agreement	2 years
Represents the gross value of all vehicles under repurchase agreements	$ 242,000,000.0	185,800,000
Maximum [Member]
Loss Contingencies [Line Items]
Estimated loss exposure under contract	$ 9,900,000	$ 14,800,000