Inventory (Details Textual) (USD $)	3 Months Ended	9 Months Ended
	Jan. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Inventory (Textual) [Abstract]
Reclassification of inventory to property, construction and office equipment	$ 20,000,000		$ 20,005,000
Aggregate purchase price of lands		437,900,000
Deposits for purchase of lands with VIE entities		22,700,000
Number of VIE Land Purchase Contracts		52
Reduction in Capitalized Interest		$ 50,600,000	$ 55,300,000