Commitments and Contingencies (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) lot
Loss Contingencies [Line Items]
Surety bonds, outstanding, amount	$ 306.7
Letters of credit outstanding, amount	145.3
Estimated cost related to letters of credit	122.4
Estimated cost related to bonds	$ 86.2
Number of lots | lot	9,487
Option Contracts
Loss Contingencies [Line Items]
Letters of credit outstanding, amount	$ 9.6
Deposits	33.6
HomeAmerican
Loss Contingencies [Line Items]
Surety bonds, outstanding, amount	$ 108.0