Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Oct. 31, 2012
Reconciliation of Company's effective tax rate from federal statutory rate
Federal tax (benefit) provision at statutory rate	$ 23,888	$ 15,034	$ 41,141	$ 18,268
State taxes, net of federal benefit	2,839	1,815	4,890	2,205
Decrease in unrecognized tax benefits		(277)
Reversal of Income Tax Reconciliation State and Local Income Taxes		(1,782)		(1,782)
Reversal of accrual for uncertain tax positions	(3,885)	(12,794)	(3,885)	(18,073)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		3,500		1,400
Valuation allowance - reversed	(1,856)	(27,847)	(3,133)	(31,164)	(394,718)
Accrued interest on anticipated tax assessments	854	650	2,837	2,600
Other	(182)	3,010	(4)	3,010
Income tax provision (benefit)	$ 21,658	$ (18,691)	$ 41,846	$ (23,536)
Federal tax (benefit) provision at statutory rate, percentage	35.00%	35.00%	35.00%	35.00%
State taxes net of federal benefit, percentage	4.20%	4.20%	4.20%	4.20%
Effective Income Tax Rate Reconciliation Increase In Unrecognized Tax Benefit		(0.60%)
Reversal of Effective Income Tax Rate Reconciliation State and Local Income Taxes		(4.20%)		(3.40%)
Reversal of accrual for uncertain tax positions, percentage	(5.70%)	(29.80%)	(3.30%)	(34.60%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent		8.10%		2.70%
Valuation allowance - reversed, percentage	(2.70%)	(64.80%)	(2.70%)	(59.70%)
Accrued interest on anticipated tax assessments, percentage	1.30%	1.50%	2.40%	5.00%
Other, percentage	(0.30%)	7.10%		5.70%
Tax provision (benefit), percentage	31.70%	(43.50%)	35.60%	(45.10%)