Commitments and Contingencies Commitments and Contingencies (Details Textual 1) $ in Millions	Oct. 31, 2017 USD ($) luxury_homes
Backlog Information [Abstract]
Number of homes to be delivered | luxury_homes	5,851
Aggregate sales value of outstanding homes to be delivered	$ 5,060.0
May 2016 Revolving Credit Facility [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	140.1
Surety Bond Construction Improvements [Member]
Loss Contingencies [Line Items]
Outstanding Surety Bonds Amount	678.0
Amount of work remains on improvements in the Company's various communities	352.2
Surety Bond Other Obligations [Member]
Loss Contingencies [Line Items]
Additional outstanding surety bonds	$ 172.7