Commitments and Contingencies (Details Textual 1) $ in Millions	Jan. 31, 2021 USD ($) luxury_homes
Backlog Information [Abstract]
Number of homes to be delivered (in ones) | luxury_homes	8,888
Aggregate sales value of outstanding homes to be delivered	$ 7,470.0
Oct 2019 Revolving Credit Facility [Member]
Loss Contingencies [Line Items]
Outstanding letter of credit	120.2
Surety Bond Construction Improvements [Member]
Loss Contingencies [Line Items]
Outstanding Surety Bonds Amount	800.4
Amount of work remains on improvements in the Company's various communities	383.6
Surety Bond Other Obligations [Member]
Loss Contingencies [Line Items]
Additional outstanding surety bonds	$ 188.5