Debt Obligations, Net - Schedule of Debt Obligations, Net (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025 USD ($) facility	Dec. 31, 2024 USD ($) facility	Jan. 31, 2025 USD ($)
Debt Instrument [Line Items]
Principal Amount	$ 3,781,081	$ 3,482,175
Carrying Value of Collateral	4,004,655	3,701,592
Carrying Value
Debt Instrument [Line Items]
Carrying Value	3,760,685	3,462,880
Debt issuance costs	$ 20,000	$ 20,000
Short-Term Facilities: \| Residential consumer loan warehouse facilities \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	8	7
Principal Amount	$ 1,210,265	$ 956,010
Facility Capacity	$ 2,875,000	$ 2,175,000
Weighted Average Interest Rate	6.13%	6.24%
Carrying Value of Collateral	$ 1,289,721	$ 1,005,926
Short-Term Facilities: \| Residential consumer loan warehouse facilities \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 1,210,265	$ 956,010
Short-Term Facilities: \| Residential investor loan warehouse facilities \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	2	2
Principal Amount	$ 234,338	$ 223,975
Facility Capacity	$ 800,000	$ 800,000
Weighted Average Interest Rate	7.36%	7.31%
Carrying Value of Collateral	$ 335,708	$ 300,843
Short-Term Facilities: \| Residential investor loan warehouse facilities \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 234,281	$ 223,876
Short-Term Facilities: \| Real estate securities repurchase facilities \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	5	6
Principal Amount	$ 236,325	$ 210,352
Facility Capacity	$ 0	$ 0
Weighted Average Interest Rate	5.51%	5.81%
Carrying Value of Collateral	$ 314,108	$ 281,997
Short-Term Facilities: \| Real estate securities repurchase facilities \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 236,325	$ 210,352
Short-Term Facilities: \| Residential MSR warehouse facility \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 68,274	$ 58,164
Facility Capacity	$ 75,000	$ 75,000
Weighted Average Interest Rate	7.57%	7.65%
Carrying Value of Collateral	$ 139,720	$ 91,506
Short-Term Facilities: \| Residential MSR warehouse facility \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 68,274	$ 58,164
Short-Term Facilities: \| HEI warehouse facility \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 91,777	$ 97,497
Facility Capacity	$ 150,000	$ 150,000
Weighted Average Interest Rate	8.82%	9.00%
Carrying Value of Collateral	$ 207,778	$ 207,097
Short-Term Facilities: \| HEI warehouse facility \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 91,777	$ 97,497
Recourse Subordinate Securities Financing: \| CAFL securities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 267,010	$ 268,240
Weighted Average Interest Rate	7.54%	7.54%
Carrying Value of Collateral	$ 319,926	$ 318,106
Recourse Subordinate Securities Financing: \| CAFL securities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 266,013	$ 267,140
Long-Term Facilities: \| Residential investor loan warehouse facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	5	5
Principal Amount	$ 554,322	$ 615,036
Facility Capacity	$ 1,530,000	$ 1,530,000
Weighted Average Interest Rate	7.77%	7.83%
Carrying Value of Collateral	$ 865,171	$ 889,901
Long-Term Facilities: \| Residential investor loan warehouse facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 552,610	$ 613,129
Long-Term Facilities: \| Servicer advance financing
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 161,907	$ 159,798
Facility Capacity	$ 200,000	$ 200,000
Weighted Average Interest Rate	6.27%	6.32%
Carrying Value of Collateral	$ 229,708	$ 233,820
Long-Term Facilities: \| Servicer advance financing \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 161,174	$ 159,031
Corporate Debt: \| Secured revolving financing facility \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 200,000	$ 225,000
Facility Capacity	$ 250,000	$ 250,000
Weighted Average Interest Rate	9.30%	9.50%
Carrying Value of Collateral	$ 302,815	$ 372,396
Corporate Debt: \| Secured revolving financing facility \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 196,187	$ 220,234
Corporate Debt: \| Promissory notes \| Facilities
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	3	3
Principal Amount	$ 11,619	$ 12,859
Facility Capacity	$ 0	$ 0
Weighted Average Interest Rate	7.07%	7.06%
Carrying Value of Collateral	$ 0	$ 0
Corporate Debt: \| Promissory notes \| Facilities \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 11,619	$ 12,859
Corporate Debt: \| 5.75% exchangeable senior notes \| Exchangeable Senior Notes
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 123,574	$ 123,574
Weighted Average Interest Rate	5.75%	5.75%
Corporate Debt: \| 5.75% exchangeable senior notes \| Exchangeable Senior Notes \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 123,309	$ 123,087
Corporate Debt: \| 7.75% convertible senior notes \| Convertible Debt
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 247,170	$ 247,170
Weighted Average Interest Rate	7.75%	7.75%
Corporate Debt: \| 7.75% convertible senior notes \| Convertible Debt \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 243,065	$ 242,652
Corporate Debt: \| Trust preferred securities and subordinated notes
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	2	2
Principal Amount	$ 139,500	$ 139,500
Weighted Average Interest Rate	6.80%	7.10%
Corporate Debt: \| Trust preferred securities and subordinated notes \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 138,871	$ 138,860
Corporate Debt: \| 9.125% Senior Notes \| Unsecured Debt
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 60,000	$ 60,000
Weighted Average Interest Rate	9.125%
Corporate Debt: \| 9.125% Senior Notes \| Unsecured Debt \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 57,980	$ 57,877
Corporate Debt: \| 9.0% Senior Notes \| Unsecured Debt
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1	1
Principal Amount	$ 85,000	$ 85,000	$ 90,000
Weighted Average Interest Rate	9.00%	9.00%	9.125%
Corporate Debt: \| 9.0% Senior Notes \| Unsecured Debt \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 82,235	$ 82,112
Corporate Debt: \| 9.125% Senior Notes \| Unsecured Debt
Debt Instrument [Line Items]
Number of Facilities or Issuances \| facility	1
Principal Amount	$ 90,000
Weighted Average Interest Rate	9.125%
Corporate Debt: \| 9.125% Senior Notes \| Unsecured Debt \| Carrying Value
Debt Instrument [Line Items]
Carrying Value	$ 86,700

Number of Facilities

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Weighted average interest rate of debt outstanding.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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