Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Oct. 31, 2012
Provision for Income Taxes
Current tax provision	$ 13,009	$ 9,872	$ 31,611	$ 24,812
Deferred tax provision (benefit)	1,955	287	4,991	2,530
Current deferred tax asset	29,188	23,697	29,188	23,697	24,912
Long-term deferred tax asset	$ 2,993	$ 2,385	$ 2,993	$ 2,385	$ 2,278