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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 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 |  | 6,218
Other settlements, net |  | 0
Ending balance - June 30, 2022 | $ 23,253 | 23,253
ABS Issued |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 8,843,147
Acquisitions |  | 952,711
Principal paydowns |  | (925,650)
Gains (losses) in net income (loss), net |  | (876,255)
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 7,993,953 | 7,993,953
Residential Loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 7,592,398
Acquisitions |  | 3,247,960
Originations |  | 0
Sales |  | (3,050,759)
Principal paydowns |  | (551,470)
Gains (losses) in net income (loss), net |  | (657,601)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | (1,962)
Ending balance - June 30, 2022 | 6,578,566 | 6,578,566
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 |  | 122,065
Originations |  | 1,721,032
Sales |  | (331,750)
Principal paydowns |  | (719,690)
Gains (losses) in net income (loss), net |  | (378,745)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | (963)
Ending balance - June 30, 2022 | 5,202,938 | 5,202,938
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 |  | (3,971)
Gains (losses) in net income (loss), net |  | (26,429)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 443,114 | 443,114
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 |  | (23,329)
Principal paydowns |  | (1,018)
Gains (losses) in net income (loss), net |  | (17,498)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 133,780 | 133,780
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 |  | (25,015)
Gains (losses) in net income (loss), net |  | 11,730
Unrealized losses in OCI, net |  | (53,009)
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 150,498 | 150,498
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 |  | (71,401)
Gains (losses) in net income (loss), net |  | (6,312)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 273,210 | 273,210
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 |  | (3,428)
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 40,803 | 40,803
HEIs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 192,740
Acquisitions |  | 97,389
Originations |  | 0
Sales |  | 0
Principal paydowns |  | (25,826)
Gains (losses) in net income (loss), net |  | 12,063
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | 0
Ending balance - June 30, 2022 | 276,366 | 276,366
MSRs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance - December 31, 2021 |  | 25,101
Acquisitions | 3,000 | 8,293
Originations |  | 0
Sales |  | (2,231)
Principal paydowns |  | (30)
Gains (losses) in net income (loss), net |  | 6,875
Unrealized losses in OCI, net |  | 0
Other settlements, net |  | (3,579)
Ending balance - June 30, 2022 | 34,429 | 34,429
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 |  | (51,265)
Other settlements, net |  | (48,615)
Ending balance - June 30, 2022 | $ 1,480 | $ 1,480

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