Stock-Based Benefit Plans (Details 5) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended		3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Oct. 31, 2012 Non-Performance Based Restricted Stock Units [Member]	Oct. 31, 2011 Non-Performance Based Restricted Stock Units [Member]	Jan. 31, 2012 Non-Performance Based RSU expense recognized [Member]	Jan. 31, 2011 Non-Performance Based RSU expense recognized [Member]
Non-Performance Based Restricted Stock Units
Issuance of restricted stock and stock units, shares			107,820	15,497
Closing price of the Company's common stock on date of issuance			$ 20.50	$ 19.32
Aggregate fair value of RSUs issued			$ 2,210	$ 299
RSU Expense Recognized
RSU expense recognized	$ 5,626	$ 5,373			$ 314	$ 27