Inventory (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Interest incurred, capitalized and expensed
Interest capitalized, beginning of period	$ 298,757	$ 267,278
Interest incurred	28,899	29,716
Interest expensed to cost of revenues	(16,321)	(18,082)
Interest directly expensed to statement of operations	0	(1,112)
Write-off against other income		(70)
Interest reclassified to property construction and office equipment		(3,000)
Interest capitalized, end of period	$ 311,335	$ 274,730