Commitments and Contingencies (Details Textual) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($) lot
Loss Contingencies [Line Items]
Surety bonds, outstanding, amount	$ 295.5
Letters of credit outstanding, amount	151.7
Estimated cost related to letters of credit	140.2
Estimated cost related to bonds	$ 107.5
Number of lots | lot	10,900
Option Contracts
Loss Contingencies [Line Items]
Letters of credit outstanding, amount	$ 10.9
Deposits	33.3
HomeAmerican
Loss Contingencies [Line Items]
Surety bonds, outstanding, amount	$ 114.0