Income Taxes (Details Textual) (USD $)	3 Months Ended	12 Months Ended
	Apr. 30, 2011	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Income Taxes (Textual) [Abstract]
Number of states		19
State taxes estimated rate, percentage		6.40%	5.00%	5.00%
Recognized cumulative valuation allowances against state deferred tax assets		$ (57,044,000)	$ (89,142,000)
Proceeds from Federal Tax Refunds	154,300,000
Valuation allowance - reversed		(394,718,000)	(25,689,000)	(128,640,000)
net operating loss, carryback expiration periods		5 years			2 years
Federal Net Operating Loss Carryforwards [Member]
Income Taxes (Textual) [Abstract]
Time period of forward tax losses		P20Y
Operating Loss Carryforwards		$ 106,300,000
State Net Operating Loss Carryforwards Low End Range [Member] | Minimum [Member]
Income Taxes (Textual) [Abstract]
Time period of forward tax losses		P5Y
State Net Operating Loss Carryforwards Low End Range [Member] | Maximum [Member]
Income Taxes (Textual) [Abstract]
Time period of forward tax losses		P20Y