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Subsequent Events - Narrative (Details) - USD ($) |  |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 11, 2021 | Jul. 06, 2021 | May 26, 2021 | Jul. 31, 2021 | Jul. 29, 2021 | Jul. 01, 2021
Class C Capital Stock |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Settlement of convertible senior notes (in shares) |  |  | 4,800,000 |  |  |
2023 Notes | Convertible senior notes |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Debt instrument, notice for redemption of convertible debt, amount |  |  | $ 372,800,000 |  |  |
Subsequent Event | Goldman Sachs Bank USA |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 750,000,000.0 |
Subsequent Event | Class C Capital Stock |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Settlement of convertible senior notes (in shares) |  |  |  | 4,700,000 |  |
Subsequent Event | Revolving Single-Family Homes Notes | Secured Debt | Forecast |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Proceeds from issuance of long-term debt | $ 450,000,000.0 |  |  |  |  |
Long-term debt, term | 30 months |  |  |  |  |
Long term debt, reinvestment period | 24 months |  |  |  |  |
Weighted average interest rate | 2.43% |  |  |  |  |
Subsequent Event | 2023 Notes | Convertible senior notes |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Debt instrument, repurchased face amount |  | $ 1,300,000 |  |  |  | $ 366,400,000
Cash paid for repurchase |  | $ 1,300,000 |  |  |  |

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