Commitments and Contingencies Commitments and Contingencies (Details Textual 1) $ in Millions	Oct. 31, 2016 USD ($) luxury_homes
Backlog Information [Abstract]
Number of homes to be delivered | luxury_homes	4,685
Aggregate sales value of outstanding homes to be delivered	$ 3,980.0
May 2016 Revolving Credit Facility [Member]
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount	83.2
Surety Bond Construction Improvements [Member]
Loss Contingencies [Line Items]
Outstanding Surety Bonds Amount	617.3
Amount of work remains on improvements in the Company's various communities	326.1
Surety Bond Other Obligations [Member]
Loss Contingencies [Line Items]
Additional outstanding surety bonds	$ 140.9