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Commitments and Contingencies - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) lot singleFamilyProperty | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Commitments and contingencies |  |  |
Number of real estate properties held-for-sale in escrow | singleFamilyProperty | 237 |  |
Number of land lots held-for-sale in escrow | lot | 50,000 |  |
Expected proceeds from sale of property held-for-sale | $ 73.8 |  |
Company contributions | 3.1 | $ 2.5 | $ 2.0
Surety Bond |  |  |
Commitments and contingencies |  |  |
Current carrying value | 185.3 |  |
Single Family |  |  |
Commitments and contingencies |  |  |
Third party development agreements and land | 12.3 |  |
Land |  |  |
Commitments and contingencies |  |  |
Third party development agreements and land | $ 228.9 |  |
Commitment to acquire properties |  |  |
Commitments and contingencies |  |  |
Number of properties | singleFamilyProperty | 52 |  |
Minimum |  |  |
Commitments and contingencies |  |  |
Operating leases have remaining lease terms | 1 year |  |
Maximum |  |  |
Commitments and contingencies |  |  |
Operating leases have remaining lease terms | 9 years |  |

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