Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Defined Contribution Pension And Other Postretirement Plans Disclosure [Line Items]
Total contributions to the ESOP	$ 8,400,000	$ 3,800,000	$ 0
401(k) Plan
Defined Contribution Pension And Other Postretirement Plans Disclosure [Line Items]
Employee benefit plans, total employer contribution	$ 5,717,000	$ 5,481,000	$ 4,992,000
401(k) Plan | Up to 3 Percent of Employee Salary
Defined Contribution Pension And Other Postretirement Plans Disclosure [Line Items]
Employee benefit plans, employer matching contribution percentage	100.00%
401(k) Plan | Between 3% and 5% of Employee Salary
Defined Contribution Pension And Other Postretirement Plans Disclosure [Line Items]
Employee benefit plans, employer matching contribution percentage	50.00%