Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Reconciliation of Company's effective tax rate from federal statutory rate
Federal tax (benefit) provision at statutory rate	$ 32,719	$ 14,339	$ 57,652	$ 17,253
State taxes, net of federal benefit	4,866	1,705	7,851	2,051
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	(2,417)		(4,251)
Other permanent differences, Deduction, Amount	(1,324)		(2,338)
Tax Adjustments, Settlements, and Unusual Provisions	(9,112)		(9,112)
Unrecognized Tax Benefits, Interest on Income Taxes Expense	340	817	1,126	1,982
Unrecognized Tax Benefits, Period Increase (Decrease)	5,406		5,406
Valuation allowance - reversed	(778)	(1,061)	(1,226)	(1,277)
Other	(1,438)	494	(1,191)	179
Income tax provision (benefit)	$ 28,262	$ 16,294	$ 53,917	$ 20,188
Federal tax (benefit) provision at statutory rate, percentage	35.00%	35.00%	35.00%	35.00%
State taxes net of federal benefit, percentage	5.20%	4.20%	4.80%	4.20%
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent	(2.60%)		(2.60%)
Other permanent differences, rate reconciliation, deduction, percent	(1.40%)		(1.40%)
Reversal of Effective Income Tax Rate Reconciliation State and Local Income Taxes	(9.70%)		(5.50%)
Accrued interest on anticipated tax assessments, percentage	0.40%	2.00%	0.70%	4.00%
Effective Income Tax Rate Reconciliation Increase In Unrecognized Tax Benefit	5.80%		3.30%
Valuation allowance - reversed, percentage	(0.80%)	(2.60%)	(0.70%)	(2.60%)
Other, percentage	(1.50%)	1.20%	(0.70%)	0.40%
Tax provision (benefit), percentage	30.20%	39.80%	32.70%	41.00%