Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Reconciliation of Company's effective tax rate from federal statutory rate
Federal tax (benefit) provision at statutory rate	$ 176,604	$ 93,694	$ 39,530
State taxes, net of federal benefit	23,778	11,363	4,711
Domestic production activities deduction	(14,796)
Other permanent differences	(6,214)	(4,914)
Reversal of accrual for uncertain tax positions	(11,022)	(5,580)	(34,167)
Accrued interest on anticipated tax assessments	1,847	3,704	5,000
Increase in unrecognized tax benefits	5,694		5,489
Valuation allowance - recognized	1,328	3,232
Valuation allowance - reversed	(13,256)	(4,569)	(394,718)
Other	587	161	(49)
Income tax provision (benefit)	$ 164,550	$ 97,091	$ (374,204)
Federal tax (benefit) provision at statutory rate, percentage	35.00%	35.00%	35.00%
State taxes net of federal benefit, percentage	4.70%	4.20%	4.20%
Domestic production activities deduction, Percent	(2.90%)	0.00%	0.00%
Other permanent differences, Percent	(1.20%)	(1.80%)	0.00%
Reversal of accrual for uncertain tax positions, percent	(2.20%)	(2.10%)	(30.30%)
Accrued interest on anticipated tax assessments, percentage	0.40%	1.40%	4.40%
Increase in unrecognized tax benefits, percentage	1.10%	0.00%	4.90%
Valuation allowance - recognized, percentage	0.30%	1.20%	0.00%
Valuation allowance - reversed, percentage	(2.60%)	(1.70%)	(349.50%)
Other, percentage	0.10%	0.10%	0.00%
Income tax provision (benefit), percentage	32.60%	36.30%	(331.30%)