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Fair Value of Financial Instruments - Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022
Point Noncontrolling Interest |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | $ 17,035
Acquisitions |  | 0
Principal paydowns |  | 0
Gains (losses) in net income (loss), net |  | 7,320
Other settlements, net |  | 0
Ending balance - September 30, 2022 | $ 24,355 | 24,355
ABS Issued |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 8,843,147
Acquisitions |  | 1,205,289
Principal paydowns |  | (1,242,859)
Gains (losses) in net income (loss), net |  | (1,241,265)
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 7,564,312 | 7,564,312
Residential Loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 7,592,398
Acquisitions |  | 3,585,882
Originations |  | 0
Sales |  | (3,702,359)
Principal paydowns |  | (734,577)
Gains (losses) in net income (loss), net |  | (985,958)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | (2,862)
Ending balance - September 30, 2022 | 5,752,524 | 5,752,524
Business purpose loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 4,790,989
Acquisitions |  | 181,814
Originations |  | 2,291,192
Sales |  | (414,998)
Principal paydowns |  | (1,086,983)
Gains (losses) in net income (loss), net |  | (503,832)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | (964)
Ending balance - September 30, 2022 | 5,257,218 | 5,257,218
Consolidated Agency multifamily loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 473,514
Acquisitions |  | 0
Originations |  | 0
Sales |  | 0
Principal paydowns |  | (5,936)
Gains (losses) in net income (loss), net |  | (40,120)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 427,458 | 427,458
Trading Securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 170,619
Acquisitions |  | 5,006
Originations |  | 0
Sales |  | (27,471)
Principal paydowns |  | (1,202)
Gains (losses) in net income (loss), net |  | (30,019)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 116,933 | 116,933
AFS Securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 206,792
Acquisitions |  | 10,000
Originations |  | 0
Sales |  | 0
Principal paydowns |  | (25,381)
Gains (losses) in net income (loss), net |  | 12,560
Unrealized losses in OCI, net |  | (61,692)
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 142,279 | 142,279
Servicer Advance Investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 350,923
Acquisitions |  | 0
Originations |  | 0
Sales |  | 0
Principal paydowns |  | (65,772)
Gains (losses) in net income (loss), net |  | (10,217)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 274,934 | 274,934
Excess MSRs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 44,231
Acquisitions |  | 0
Originations |  | 0
Sales |  | 0
Principal paydowns |  | 0
Gains (losses) in net income (loss), net |  | (3,779)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 40,452 | 40,452
HEIs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 192,740
Acquisitions |  | 176,439
Originations |  | 0
Sales |  | 0
Principal paydowns |  | (35,187)
Gains (losses) in net income (loss), net |  | 6,445
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - September 30, 2022 | 340,437 | 340,437
MSRs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 25,101
Acquisitions | 0 | 8,293
Originations |  | 0
Sales |  | (3,044)
Principal paydowns |  | (137)
Gains (losses) in net income (loss), net |  | 9,336
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | (3,579)
Ending balance - September 30, 2022 | 35,970 | 35,970
Derivatives |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 4,130
Acquisitions |  | 0
Principal paydowns |  | 0
Gains (losses) in net income (loss), net |  | (53,962)
Other settlements, net |  | (50,364)
Ending balance - September 30, 2022 | $ 532 | $ 532

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