Annual report pursuant to Section 13 and 15(d)

Fair Value - Summary Of Recognized Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details)

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Fair Value - Summary Of Recognized Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets    
Retained bonds $ 44,297 $ 46,439
Fair Value, Recurring    
Assets    
Retained bonds 44,297 46,439
Total assets 26,451,993 19,803,289
Liabilities    
HMBS related obligations 17,353,720 10,996,755
Nonrecourse debt in consolidated VIE trusts and reverse loan financing liability 7,876,932 7,175,857
Nonrecourse commercial loan financing liability 27,268 106,758
Nonrecourse MSR financing liability   60,562
Deferred purchase price liabilities 4,318 137
TRA obligation 4,537 3,781
Total liabilities 25,267,925 18,345,352
Fair Value, Recurring | Loans held for investment, subject to HMBS related obligations    
Assets    
Loans held for investment, at fair value 17,548,763 11,114,100
Fair Value, Recurring | Reverse mortgage loans, subject to recourse    
Assets    
Loans held for investment, at fair value 8,138,403 7,065,477
Fair Value, Recurring | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 133,990 389,161
Fair Value, Recurring | Reverse mortgage loans, not subject to recourse    
Assets    
Loans held for investment, at fair value 574,271 771,724
Fair Value, Recurring | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 957 136,274
Fair Value, Recurring | Residential mortgage loans    
Assets    
Total loans held for sale, at fair value 4,246 12,123
Fair Value, Recurring | Commercial mortgage loans    
Assets    
Total loans held for sale, at fair value   161,861
Fair Value, Recurring | MSR    
Assets    
MSR 6,436 95,096
Fair Value, Recurring | LPCs, forward MBS, and TBAs    
Assets    
Derivative assets   907
Fair Value, Recurring | Interest rate swaps and futures contracts    
Assets    
Derivative assets   771
Liabilities    
Derivative liabilities   385
Fair Value, Recurring | Reverse mortgage loans    
Assets    
Purchase commitments - reverse mortgage loans   9,356
Fair Value, Recurring | LPCs    
Assets    
Purchase commitments - reverse mortgage loans 630  
Fair Value, Recurring | Warrant liability    
Liabilities    
Derivative liabilities 1,150 1,117
Fair Value, Recurring | Level 1    
Assets    
Retained bonds 0 0
Total assets 0 771
Liabilities    
HMBS related obligations 0 0
Nonrecourse debt in consolidated VIE trusts and reverse loan financing liability 0 0
Nonrecourse commercial loan financing liability 0 0
Nonrecourse MSR financing liability   0
Deferred purchase price liabilities 0 0
TRA obligation 0 0
Total liabilities 1,150 1,502
Fair Value, Recurring | Level 1 | Loans held for investment, subject to HMBS related obligations    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 1 | Reverse mortgage loans, subject to recourse    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 1 | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 1 | Reverse mortgage loans, not subject to recourse    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 1 | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 1 | Residential mortgage loans    
Assets    
Total loans held for sale, at fair value 0 0
Fair Value, Recurring | Level 1 | Commercial mortgage loans    
Assets    
Total loans held for sale, at fair value   0
Fair Value, Recurring | Level 1 | MSR    
Assets    
MSR 0 0
Fair Value, Recurring | Level 1 | LPCs, forward MBS, and TBAs    
Assets    
Derivative assets   0
Fair Value, Recurring | Level 1 | Interest rate swaps and futures contracts    
Assets    
Derivative assets   771
Liabilities    
Derivative liabilities   385
Fair Value, Recurring | Level 1 | Reverse mortgage loans    
Assets    
Purchase commitments - reverse mortgage loans   0
Fair Value, Recurring | Level 1 | LPCs    
Assets    
Purchase commitments - reverse mortgage loans 0  
Fair Value, Recurring | Level 1 | Warrant liability    
Liabilities    
Derivative liabilities 1,150 1,117
Fair Value, Recurring | Level 2    
Assets    
Retained bonds 0 0
Total assets 4,876 13,030
Liabilities    
HMBS related obligations 0 0
Nonrecourse debt in consolidated VIE trusts and reverse loan financing liability 0 0
Nonrecourse commercial loan financing liability 0 0
Nonrecourse MSR financing liability   0
Deferred purchase price liabilities 0 0
TRA obligation 0 0
Total liabilities 0 0
Fair Value, Recurring | Level 2 | Loans held for investment, subject to HMBS related obligations    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 2 | Reverse mortgage loans, subject to recourse    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 2 | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 2 | Reverse mortgage loans, not subject to recourse    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 2 | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 0 0
Fair Value, Recurring | Level 2 | Residential mortgage loans    
Assets    
Total loans held for sale, at fair value 4,246 12,123
Fair Value, Recurring | Level 2 | Commercial mortgage loans    
Assets    
Total loans held for sale, at fair value   0
Fair Value, Recurring | Level 2 | MSR    
Assets    
MSR 0 0
Fair Value, Recurring | Level 2 | LPCs, forward MBS, and TBAs    
Assets    
Derivative assets   907
Fair Value, Recurring | Level 2 | Interest rate swaps and futures contracts    
Assets    
Derivative assets   0
Liabilities    
Derivative liabilities   0
Fair Value, Recurring | Level 2 | Reverse mortgage loans    
Assets    
Purchase commitments - reverse mortgage loans   0
Fair Value, Recurring | Level 2 | LPCs    
Assets    
Purchase commitments - reverse mortgage loans 630  
Fair Value, Recurring | Level 2 | Warrant liability    
Liabilities    
Derivative liabilities 0 0
Fair Value, Recurring | Level 3    
Assets    
Retained bonds 44,297 46,439
Total assets 26,447,117 19,789,488
Liabilities    
HMBS related obligations 17,353,720 10,996,755
Nonrecourse debt in consolidated VIE trusts and reverse loan financing liability 7,876,932 7,175,857
Nonrecourse commercial loan financing liability 27,268 106,758
Nonrecourse MSR financing liability   60,562
Deferred purchase price liabilities 4,318 137
TRA obligation 4,537 3,781
Total liabilities 25,266,775 18,343,850
Fair Value, Recurring | Level 3 | Loans held for investment, subject to HMBS related obligations    
Assets    
Loans held for investment, at fair value 17,548,763 11,114,100
Fair Value, Recurring | Level 3 | Reverse mortgage loans, subject to recourse    
Assets    
Loans held for investment, at fair value 8,138,403 7,065,477
Fair Value, Recurring | Level 3 | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 133,990 389,161
Fair Value, Recurring | Level 3 | Reverse mortgage loans, not subject to recourse    
Assets    
Loans held for investment, at fair value 574,271 771,724
Fair Value, Recurring | Level 3 | Commercial mortgage loans    
Assets    
Loans held for investment, at fair value 957 136,274
Fair Value, Recurring | Level 3 | Residential mortgage loans    
Assets    
Total loans held for sale, at fair value 0 0
Fair Value, Recurring | Level 3 | Commercial mortgage loans    
Assets    
Total loans held for sale, at fair value   161,861
Fair Value, Recurring | Level 3 | MSR    
Assets    
MSR 6,436 95,096
Fair Value, Recurring | Level 3 | LPCs, forward MBS, and TBAs    
Assets    
Derivative assets   0
Fair Value, Recurring | Level 3 | Interest rate swaps and futures contracts    
Assets    
Derivative assets   0
Liabilities    
Derivative liabilities   0
Fair Value, Recurring | Level 3 | Reverse mortgage loans    
Assets    
Purchase commitments - reverse mortgage loans   9,356
Fair Value, Recurring | Level 3 | LPCs    
Assets    
Purchase commitments - reverse mortgage loans 0  
Fair Value, Recurring | Level 3 | Warrant liability    
Liabilities    
Derivative liabilities $ 0 $ 0