Commitments and Contingencies Warranty Rollforward (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Warranty Accrual Rollforward [Abstract] | ||||
| Warranty reserves, beginning of period | $ 29,970 | $ 29,880 | $ 29,728 | $ 29,012 |
| Warranty expense on homes delivered during the period | 5,373 | 4,834 | 15,479 | 15,246 |
| Changes in estimates for pre-existing warranties | 2,342 | 1,745 | 3,520 | 2,356 |
| Settlements made during the period | (6,807) | (6,078) | (17,849) | (16,233) |
| Warranty reserves, end of period | 30,878 | $ 30,381 | 30,878 | $ 30,381 |
| Estimated Repair Costs for Affected Homes | $ 2,100 | $ 2,100 | ||