Capital Shares - Additional Information (Detail) - $ / shares	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Equity [Line Items]
Convertible preferred shares, authorized	10,000,000	10,000,000
Convertible preferred shares, No par value
Common shares, authorized	160,000,000	160,000,000
Common shares, No par value
Common shares, issued	98,023,000	98,023,000
Common Shares Outstanding	57,358,000	62,435,000
Preferred Class A [Member]
Equity [Line Items]
Convertible preferred shares, authorized	10,000,000
Convertible preferred shares, No par value
Convertible preference shares outstanding	0	0	0