Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2015	Oct. 31, 2014	Oct. 31, 2013 customer
Concentration Risk [Line Items]
Number of customers each accounting for greater than 10% of net accounts receivable	1		0
Allowance for Doubtful Accounts [Abstract]
Allowance for doubtful accounts	2.0	$ 2.1
Customer A and Customer B | Customer Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	17.10%