Fair Value Disclosures (Level 4 inventory fv) (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended						6 Months Ended		12 Months Ended
	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Apr. 30, 2014	Apr. 30, 2013	Oct. 31, 2013
Statement of Inventory [Line Items]
Number of Operating Communities Tested	65	67	63	76	79	60
Number of Communities Impaired	2	1	2	1	1	2
Fair Value of the Impaired Inventory	$ 6,211	$ 7,131	$ 6,798	$ 191	$ 749	$ 5,377
Inventory Write-down	1,924				1,029		3,906	1,738
Operating communities [Member]
Statement of Inventory [Line Items]
Inventory Write-down	$ 1,600	$ 1,300	$ 2,200	$ 100	$ 340	$ 700	$ 2,900	$ 1,040	$ 3,340