Acquisition (Detail Textuals) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2014 USD ($)	Apr. 30, 2014 USD ($)	Oct. 31, 2014 USD ($)	Oct. 31, 2014 USD ($)	Oct. 31, 2015 USD ($) luxury_homes	Oct. 31, 2014 USD ($) communities home_sites	Oct. 31, 2013 USD ($)	Feb. 04, 2014 USD ($) home_sites	Aug. 01, 2013 USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired						$ 1,489,116
Number of Homes to be Delivered | luxury_homes					4,064
Sales Value of Outstanding Deliver Homes					$ 3,500,000
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,507,835
Shapell [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition					Feb. 04, 2014
Business Acquisition, Name of Acquired Entity					Shapell Industries, Inc.
Business Acquisition, Date of Acquisition Agreement					Nov. 06, 2013
Number of home sites included in acquisition | home_sites						4,950
Business acquisition, number of selling communities | communities						11
Number of Homes to be Delivered | home_sites								126
Sales Value of Outstanding Deliver Homes								$ 105,300
Proceeds from Issuance of Debt and Equity	$ 815,700
Business Combination, Acquisition Related Costs			$ 5,300			$ 6,100	$ 1,400
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			300,800
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ 37,200
Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity									$ 1,035,000
Revolving Credit Facility [Member] | Shapell [Member]
Business Acquisition [Line Items]
Long-term Line of Credit				$ 370,000
Five year term note [Member]
Business Acquisition [Line Items]
Long-term Debt	$ 15,000	$ 485,000