Fair Value Disclosures (Level 4 inventory fv) (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2013
Statement of Inventory [Line Items]
Number of Operating Communities Tested	67	63	76	79	60
Number of Communities Impaired	1	2	1	1	2
Fair Value of the Impaired Inventory	$ 7,131	$ 6,798	$ 191	$ 749	$ 5,377
Inventory Write-down	1,982				709
Operating communities [Member]
Statement of Inventory [Line Items]
Inventory Write-down	$ 1,300	$ 2,200	$ 100	$ 340	$ 700	$ 3,340