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Warehouse Receivables & Warehouse Lines of Credit - Summary of Warehouse Lines of Credit in Place (Details) - USD ($) |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 01, 2023 | Jul. 15, 2023 | Sep. 30, 2023 | Dec. 31, 2022
Short-term Debt [Line Items] |  |  |  |
Carrying Value |  |  | $ 994,119,000 | $ 447,840,000
Revolving credit facility |  |  | 673,000,000 | 178,000,000
Warehouse Agreement Borrowings |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | 3,200,000,000 | 3,600,000,000
Carrying Value |  |  | 994,119,000 | 447,840,000
Warehouse Agreement Borrowings | JP Morgan | JP Morgan Chase Bank, N.A. (JP Morgan), Pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | 1,335,000,000 | 1,335,000,000
Carrying Value |  |  | $ 841,189,000 | 330,509,000
Warehouse Agreement Borrowings | JP Morgan | JP Morgan Chase Bank, N.A. (JP Morgan), Pricing | Secured Overnight Financing Rate (SOFR) Overnight Index Swap |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 1.60% |
Warehouse Agreement Borrowings | JP Morgan | JP Morgan Chase Bank, N.A. (JP Morgan), Pricing | Secured Overnight Financing Rate (SOFR) Adjustment |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 0.05% |
Warehouse Agreement Borrowings | JP Morgan | JP Morgan, Pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | $ 15,000,000 | 15,000,000
Carrying Value |  |  | $ 0 | 0
Warehouse Agreement Borrowings | JP Morgan | JP Morgan, Pricing | Secured Overnight Financing Rate (SOFR) Overnight Index Swap |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 2.75% |
Warehouse Agreement Borrowings | JP Morgan | JP Morgan, Pricing | Secured Overnight Financing Rate (SOFR) Adjustment |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 0.05% |
Warehouse Agreement Borrowings | Fannie Mae ASAP Program | Fannie Mae Multifamily ASAP Program, Pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | $ 650,000,000 | 650,000,000
Carrying Value |  |  | $ 55,697,000 | 0
Warehouse Agreement Borrowings | Fannie Mae ASAP Program | Fannie Mae Multifamily ASAP Program, Pricing | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 1.45% |
Warehouse Agreement Borrowings | Fannie Mae ASAP Program | Fannie Mae Multifamily ASAP Program, Pricing | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 0.25% |
Warehouse Agreement Borrowings | TD Bank | TD Bank, Pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  | $ 300,000,000 | $ 600,000,000 | 800,000,000
Carrying Value |  |  | 24,532,000 | 0
Revolving credit facility |  | $ 300,000,000 | $ 300,000,000 |
Warehouse Agreement Borrowings | TD Bank | TD Bank, Pricing | Secured Overnight Financing Rate (SOFR) Overnight Index Swap |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  | 1.30% | 1.30% |
Warehouse Agreement Borrowings | TD Bank | TD Bank, Pricing | Secured Overnight Financing Rate (SOFR) Adjustment |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  | 0.10% | 0.10% |
Warehouse Agreement Borrowings | Bank of America (BofA) | Bank of America, Pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | $ 350,000,000 | 350,000,000
Carrying Value |  |  | $ 72,701,000 | 115,206,000
Warehouse Agreement Borrowings | Bank of America (BofA) | Bank of America, Pricing | Secured Overnight Financing Rate (SOFR) Overnight Index Swap |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 1.25% |
Warehouse Agreement Borrowings | Bank of America (BofA) | Bank of America, Pricing | Secured Overnight Financing Rate (SOFR) Adjustment |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) | 0.10% |  | 0.10% |
Warehouse Agreement Borrowings | Bank of America (BofA) | Bank of America, Pricing | London Interbank Offered Rate (LIBOR) |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) | 1.25% |  |  |
Warehouse Agreement Borrowings | Bank of America (BofA) | BofA, pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | $ 250,000,000 | 250,000,000
Carrying Value |  |  | $ 0 | 0
Warehouse Agreement Borrowings | Bank of America (BofA) | BofA, pricing | Secured Overnight Financing Rate (SOFR) Overnight Index Swap |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) |  |  | 1.25% |
Warehouse Agreement Borrowings | Bank of America (BofA) | BofA, pricing | Secured Overnight Financing Rate (SOFR) Adjustment |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) | 0.10% |  | 0.10% |
Warehouse Agreement Borrowings | Bank of America (BofA) | BofA, pricing | London Interbank Offered Rate (LIBOR) |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Variable rate (as a percent) | 1.25% |  |  |
Warehouse Agreement Borrowings | MUFG Union Bank, N.A. (Union Bank) | MUFG Union Bank, N.A. (Union Bank), Pricing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Maximum Facility Size |  |  | $ 0 | 200,000,000
Carrying Value |  |  | $ 0 | $ 2,125,000

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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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