Basis of Presentation (Details) $ in Millions |
3 Months Ended | 6 Months Ended | |
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Dec. 31, 2020
USD ($)
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Mar. 31, 2021
USD ($)
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Mar. 31, 2020
USD ($)
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Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||
Noncontrolling Interest, Ownership Percentage by Parent | 64.00% | ||
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 36.00% | ||
Payments related to business acquisitions | $ | $ 23.0 | $ 24.2 | $ 5.6 |
Business Acquisition, Number of Homes Acquired | 90 | ||
Business Acquisition, Number of Finished Lots Acquired | 95 | ||
Business Acquisition, Number of Lots Under Option Contracts | 840 | ||
Business Acquisition, Sales Order Backlog Acquired | 125 |