Useful Life in Years (Detail)	12 Months Ended
	Oct. 31, 2012
Computer and Office Equipment | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful lives of depreciable assets	3 years
Computer and Office Equipment | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful lives of depreciable assets	5 years
Building
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful lives of depreciable assets	30 years
Furniture and Fixtures
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful lives of depreciable assets	5 years
Leasehold Improvements
Property Plant and Equipment Estimated Useful Lives [Line Items]
Useful lives of depreciable assets	5 years