Capital Shares - Additional Information (Detail) - shares	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Equity [Line Items]
Convertible preferred shares, authorized (in shares)	10,000,000	10,000,000
Common shares, authorized (in shares)	160,000,000	160,000,000
Common shares, issued (in shares)	98,023,000	98,023,000
Common Shares Outstanding (in shares)	55,920,000	57,197,000
Preferred Class A
Equity [Line Items]
Convertible preferred shares, authorized (in shares)	10,000,000	10,000,000	10,000,000
Convertible preferred shares, outstanding (in shares)	0	0	0