Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Reconciliation of Company's effective tax rate from federal statutory rate
Federal tax (benefit) provision at statutory rate	$ 52,964	$ 23,888	$ 110,615	$ 41,141
State taxes, net of federal benefit	6,904	2,839	14,755	4,890
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	(2,809)		(7,059)
Other permanent differences, Deduction, Amount	(1,827)		(4,165)
Effective rate reconciliation reversal of accrual for uncertain tax positions	(180)	(3,885)	(9,292)	(3,885)
Unrecognized Tax Benefits, Interest on Income Taxes Expense	358	854	1,484	2,837
Unrecognized Tax Benefits, Period Increase (Decrease)			5,406
Valuation allowance - reversed	(1,429)	(1,856)	(2,655)	(3,133)
Other	(363)	(182)	(1,553)	(4)
Income tax provision (benefit)	$ 53,618	$ 21,658	$ 107,536	$ 41,846
Federal tax (benefit) provision at statutory rate, percentage	35.00%	35.00%	35.00%	35.00%
State taxes net of federal benefit, percentage	4.60%	4.20%	4.70%	4.20%
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent	(1.90%)		(2.20%)
Other permanent differences, rate reconciliation, deduction, percent	(1.20%)		(1.30%)
Effective rate reconciliation reversal of accrual for uncertain tax positions, percent	(0.10%)	(5.70%)	(2.90%)	(3.30%)
Accrued interest on anticipated tax assessments, percentage	0.20%	1.30%	0.50%	2.40%
Effective Income Tax Rate Reconciliation Increase In Unrecognized Tax Benefit			1.70%
Valuation allowance - reversed, percentage	(0.90%)	(2.70%)	(0.80%)	(2.70%)
Other, percentage	(0.20%)	(0.30%)	(0.50%)	0.00%
Tax provision (benefit), percentage	35.40%	31.70%	34.00%	35.60%