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Debt - Schedule of Warehouse Lines of Credit (Details) - USD ($) | Jun. 30, 2021 | Jun. 26, 2021 | Jun. 25, 2021
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Comerica Bank |  |  |
Debt Instrument [Line Items] |  |  |
Maximum Borrowing Capacity |  | $ 60,000,000.0 | $ 100,000,000.0
Line of Credit | Mortgages segment |  |  |
Debt Instrument [Line Items] |  |  |
Maximum Borrowing Capacity | $ 460,000,000 |  |
Line of Credit | Credit Suisse AG, Cayman Islands | Mortgages segment |  |  |
Debt Instrument [Line Items] |  |  |
Maximum Borrowing Capacity | $ 300,000,000 |  |
Weighted-Average Interest Rate | 2.50% |  |
Line of Credit | Citibank, N.A. | Mortgages segment |  |  |
Debt Instrument [Line Items] |  |  |
Maximum Borrowing Capacity | $ 100,000,000 |  |
Weighted-Average Interest Rate | 1.85% |  |
Line of Credit | Comerica Bank | Mortgages segment |  |  |
Debt Instrument [Line Items] |  |  |
Maximum Borrowing Capacity | $ 60,000,000 |  |
Weighted-Average Interest Rate | 2.70% |  |

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