Commitments and Contingencies Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2022 USD ($)
Commitments and Contingencies [Abstract]
Letters of credit and completion bonds	$ 386.1
Performance bonds outstanding	307.1
Performance letters of credit outstanding	62.2
Financial letters of credit	11.9
Financial letters of credit representing deposits on land and lot purchase agreements	11.4
Financial Bonds	4.9
Unrecorded conditional purchase obligation	$ 961.5