| Managed Servicing Portfolio | — | $8.8B | $9.0B | $9.2B | $9.3B | $9.4B | $9.4B | $9.3B |
| Financing Receivable And Loans Held For Sale, After Allowance for Credit Loss And Valuation Allowance, Unpaid Principal Balance | — | $9.7B | $9.0B | $9.0B | $8.5B | $6.8B | $6.3B | $4.9B |
| Total, Carrying Value | — | $9.4B | $8.5B | $8.4B | $7.9B | $6.5B | $5.9B | $4.5B |
| Total Loans, net | — | — | $8.7B | $8.1B | $7.6B | $6.6B | $5.5B | $4.5B |
| Line of Credit Maximum Borrowing Capacity | — | $4.9B | — | $4.5B | $5.4B | $5.5B | — | $4.2B |
| Committed Revolving Credit Facilities | — | $4.9B | — | $4.5B | $5.4B | $5.5B | — | $4.2B |
| Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | — | $2.2B | $2.1B | $2.7B | $3.5B | $2.9B | $2.8B | $2.3B |
| Originated, at amortized cost, more than five years before current fiscal year | — | — | $1.6B | $1.9B | $1.8B | $1.2B | $1.1B | $1.9B |
| UPB of non-accrual loans | — | $277.3M | $654.5M | $1.1B | $1.0B | $503.8M | $1.5B | $1.4B |
| Long-term debt, gross | — | $1.2B | — | $1.5B | $1.4B | $1.4B | — | $1.3B |
| 2021 | — | — | $295.4M | $2.3B | $2.1B | $2.0B | $1.4B | $1.3B |
| Non-accrual loans with an allowance | — | $241.8M | $509.8M | $797.7M | $802.2M | $434.0M | $1.3B | $1.2B |
| Remainder of 2026 | — | $0.0 | — | $102.4M | $0.0 | $0.0 | — | $517.4M |
| Remainder of Fiscal Year 2024 | — | $0.0 | — | $102.4M | $0.0 | $0.0 | — | $517.4M |
| Borrowings Under Guaranteed Investment Agreements | $782.3M | $742.6M | $691.1M | $668.8M | $629.4M | $565.9M | $524.1M | $501.7M |
| Purchase Obligation | — | $742.6M | — | $668.8M | $629.4M | $565.9M | — | $501.7M |
| Common stock, shares authorized (in shares) | — | $500.0M | $500.0M | $500.0M | $500.0M | $500.0M | $500.0M | $500.0M |
| 2023 | — | — | $2.7B | $412.7M | $396.7M | $353.9M | $324.7M | $489.1M |
| Thereafter | — | — | — | $646.3M | $609.6M | $547.3M | — | $481.0M |
| Aggregate Notional Principal Outstanding | — | $646.4M | $457.4M | $457.4M | $457.4M | $444.0M | $438.7M | $438.7M |
| Derivative Notional Amount | — | $646.4M | $457.4M | $457.4M | $457.4M | $444.0M | $438.7M | $438.7M |
| Notional | — | $646.4M | $457.4M | $457.4M | $457.4M | $444.0M | $438.7M | $438.7M |
| 2028 | — | $760.9M | — | $100.0M | $100.0M | $100.0M | — | $380.0M |
| Total REO, held for sale | — | — | $142.7M | — | — | $322.4M | $360.1M | $351.7M |
| Total REO, held for use | — | — | $0.0 | — | — | $261.7M | $260.1M | $258.5M |
| 2029 | — | $100.0M | — | $330.0M | $380.0M | $380.0M | — | $244.6M |
| Loans modified, nonaccrual | — | — | — | — | — | — | — | $232.2M |
| 2022 | — | — | $2.8B | $2.4B | $2.2B | $2.0B | $1.5B | $231.2M |
| Year two | — | — | $412.8M | $568.4M | $563.5M | $574.1M | $547.3M | $225.0M |
| Equity method investments (Note 11) | $134.6M | $146.4M | $161.6M | $170.9M | $169.4M | $178.8M | $161.4M | $167.3M |
| Common stock, shares issued (in shares) | — | $168.5M | $162.8M | $172.5M | $164.3M | $161.8M | $163.0M | $165.3M |
| Common Stock, Shares, Outstanding | — | $168.5M | $162.8M | $172.5M | $164.3M | $161.8M | $163.0M | $165.3M |
| Allowance for loan losses related to non-accrual loans | — | -$16.6M | -$125.2M | -$192.6M | -$178.2M | -$47.8M | -$133.8M | -$146.7M |
| Noncontrolling interests in subsidiaries | $99.0M | $96.7M | $97.7M | $99.6M | $98.5M | $100.5M | $99.2M | $100.8M |
| 2027 | — | $120.0M | — | $699.0M | $649.3M | $649.3M | — | $100.0M |
| Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value | $124.5M | $125.1M | $105.7M | $104.0M | $96.0M | $97.6M | $98.7M | $91.0M |
| Loans, held for sale, valuation allowance | — | $156.1M | $97.6M | $158.1M | $212.7M | $53.9M | $67.6M | $74.3M |
| Preferred equity investment | — | — | — | — | — | — | $79.9M | $72.7M |
| Receivable from third party | — | $34.9M | $34.5M | $35.4M | $41.1M | $47.2M | $44.0M | $57.2M |
| Indefinite- lived intangible impairment | — | $46.7M | $48.0M | $49.4M | $51.8M | $54.9M | $54.7M | $55.8M |
| Thereafter | — | $52.7M | — | $47.3M | $47.2M | $50.3M | — | $42.1M |
| Thereafter | — | $131.3M | — | $36.3M | $36.3M | $36.3M | — | $36.3M |
| Mortgage-backed securities, fair value | — | — | — | — | — | — | $34.5M | $31.6M |
| Year one | — | — | $580.8M | $94.4M | $152.4M | $210.6M | $290.8M | $28.3M |
| Due from servicers | — | $8.1M | $7.0M | $8.1M | $0.0 | $8.1M | $72.0M | $28.0M |
| Mortgage Loans In Process Of Foreclosure Amount | — | $35.4M | $8.4M | $11.1M | $14.6M | $31.3M | $17.9M | $25.7M |
| Business Combination, Contingent Consideration, Liability | $3.9M | $2.0M | $573.0K | $16.0M | $17.2M | $18.4M | $18.7M | $20.4M |
| 2027 | — | $21.6M | — | $20.4M | $20.6M | $22.2M | — | $20.0M |
| Derivative, gross, assets | — | $35.8M | $33.4M | $27.1M | $24.0M | $21.8M | $19.7M | $19.0M |
| Finite-Lived Intangible Assets, Accumulated Amortization | — | $9.5M | $11.0M | $12.6M | $14.3M | $16.1M | $16.5M | $18.3M |
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | — | $16.0M | — | $24.2M | $23.8M | $22.4M | — | $17.6M |
| 2026 | — | $6.6M | — | $17.9M | $11.7M | $6.2M | — | $17.4M |
| Tax receivable | — | $72.8M | $1.7M | $7.7M | $50.0M | $60.2M | $719.0K | $16.7M |
| 2028 | — | $18.3M | — | $17.1M | $17.3M | $18.8M | — | $16.7M |
| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | — | $24.7M | $25.4M | $20.1M | $18.3M | $16.5M | $13.0M | $14.9M |
| 2029 | — | $15.5M | — | $14.5M | $14.7M | $15.7M | — | $14.6M |
| 2030 | — | $13.2M | — | $12.6M | $12.8M | $13.8M | — | $12.8M |
| Repair and denial reserve | — | $7.3M | $7.4M | $8.2M | $8.5M | $9.0M | $12.3M | $12.7M |
| Receivable from third party | — | — | — | — | — | — | $12.4M | $12.4M |
| Thereafter | — | — | — | $10.2M | $10.4M | $11.6M | — | $10.7M |
| Deferred financing costs | — | $10.8M | $8.1M | $10.1M | $10.2M | $12.3M | $12.5M | $10.4M |
| Deferred loan exit fees | — | $28.0M | $27.8M | $25.9M | $23.7M | $22.5M | $19.2M | $10.1M |
| Other Contractual Commitments | — | $6.9M | — | $9.5M | $9.0M | $9.2M | — | $8.4M |
| Contractual Obligation, to be Paid, Year Four | — | $6.9M | — | $9.5M | $9.0M | $9.2M | — | $8.4M |
| Lease payable | — | $17.2M | $17.8M | $16.5M | $8.8M | $8.5M | $8.6M | $8.2M |
| 2027 | — | $5.7M | — | $5.6M | $6.0M | $6.3M | — | $7.1M |
| PPP receivables | — | $23.3M | $18.4M | $14.9M | $12.6M | $10.6M | $8.8M | $6.8M |
| Contractual Obligation, to be Paid, Year Three | — | $1.5M | — | $7.3M | $6.2M | $5.4M | — | $6.2M |
| 2028 | — | $5.0M | — | $5.4M | $5.9M | $6.1M | — | $6.1M |
| Equity Method Investments Fair Value Disclosure | — | $6.8M | $6.6M | $6.4M | $6.2M | $6.0M | $5.7M | $5.5M |
| Remainder of 2026 | — | $1.5M | — | $4.6M | $3.3M | $2.0M | — | $5.4M |
| Remainder of Fiscal Year 2025 | — | $1.5M | — | $4.6M | $3.3M | $2.0M | — | $5.4M |
| With an allowance | — | — | $89.4M | $97.2M | $106.7M | $118.9M | $90.0K | $4.8M |
| Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction | — | $11.0M | $8.0M | $6.9M | $5.8M | $5.3M | $6.7M | $4.1M |
| 2029 | — | $4.9M | — | $4.4M | $4.8M | $5.1M | — | $3.9M |
| PPP liabilities | — | $24.2M | $20.9M | $15.3M | $12.8M | $10.4M | $8.6M | $3.8M |
| Contractual Obligation, to be Paid, Year Two | — | $325.0K | — | $4.7M | $3.9M | $3.5M | — | $3.7M |
| Liabilities of consolidated VIEs | — | $53.9M | $4.2M | $23.8M | $17.6M | $2.5M | $2.5M | $3.3M |
| 2030 | — | $3.9M | — | $3.0M | $3.5M | $3.6M | — | $2.5M |
| Cash, cash equivalents, and restricted cash in assets of consolidated VIEs | $22.8M | $22.9M | — | $2.9M | $2.8M | $2.5M | — | $1.9M |
| Fair Value Measurement Disclosure | — | $2.1M | $352.0K | $575.0K | $2.0M | $1.6M | $1.4M | $948.0K |
| Gross Assets/Liabilities | — | $2.1M | $352.0K | $575.0K | $2.0M | $1.6M | $1.4M | $948.0K |
| Derivatives, gross, liabilities | — | $2.1M | $352.0K | $575.0K | $2.0M | $1.6M | $1.4M | $948.0K |
| Derivative Liability | — | $2.1M | $352.0K | $575.0K | $2.0M | $1.6M | $1.4M | $948.0K |
| Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral | — | $4.6M | $2.9M | $951.0K | $2.2M | $1.6M | $1.4M | $948.0K |
| Accrued Professional Fees Current And Noncurrent | — | $1.2M | $5.5M | $4.8M | $7.9M | $2.5M | $2.7M | $718.0K |
| Loans, net | — | $4.9M | $3.5M | $2.0M | $1.3M | $1.1M | $737.0K | $462.0K |
| Below Market Lease Gross | — | — | — | — | — | $417.0K | $418.0K | $426.0K |
| PPP loans | — | — | — | — | — | — | $208.0K | $266.0K |
| Other Contractual Commitments - Remainder of Fiscal Year 2024 | — | — | — | $127.0K | $54.0K | $21.0K | — | $168.0K |
| Contractual Obligation, to be Paid, Remainder of Fiscal Year | — | — | — | $127.0K | $54.0K | $21.0K | — | $168.0K |
| Below Market Lease Accumulated Amortization | — | — | — | — | — | $6.0K | $14.0K | $22.0K |
| Number of loans that did not make payments in accordance with their modified terms | — | 1.00 | — | 14.00 | 17.00 | 30.00 | — | 52.00 |
| Preferred Stock Liquidation Preference | — | $25.0 | $25.0 | $25.0 | $25.0 | $25.0 | $25.0 | $25.0 |
| Preferred stock Series C, liquidation preference (in dollars per share) | — | $25.00 | $25.00 | $25.00 | $25.00 | $25.00 | $25.00 | $25.00 |
| Loans 90+ Days Past Due Percentage | — | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Nonperforming Loans and Leases Percentage | — | 2.8% | 6.3% | 11.0% | 11.5% | 7.2% | 25.5% | 29.3% |
| Common stock, par value (in dollars per share) | — | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash | — | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 |
| 2030 | — | $110.0M | — | $245.3M | $245.3M | $244.6M | — | $0.0 |
| Depreciation and accumulated depreciation | — | — | — | $0.0 | — | — | — | — |
| Penalties and interest accrued on unrecognized tax benefits | — | $0.0 | — | $0.0 | $0.0 | $0.0 | — | $0.0 |