Fair Value of Financial Instruments - Schedule of Valuation Method of Level 3 Financial Instruments Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands

9 Months Ended

12 Months Ended

Sep. 30, 2026

Dec. 31, 2025

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Commercial mortgage loans, held for sale, measured at fair value - Non-Agency

^[1]

$ 373,181

$ 360,718

Fair Value, Measurements, Recurring

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Commercial mortgage loans, held for sale, measured at fair value - Non-Agency

11,179

29,500

Fair Value, Measurements, Recurring | Level III

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Commercial mortgage loans, held for sale, measured at fair value - Non-Agency

11,179

29,500

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Commercial mortgage loans, held for sale, measured at fair value - Non-Agency

11,179

29,500

Loan commitments and forward sale commitments, net

$ 17,509

5,106

Yield (percentage)

7.18%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | VIE assets, measured at fair value(1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Commercial mortgage loans, at fair value

$ 518,364

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | CML, HFS, measured at fair value - Agency

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Commercial mortgage loans, held for sale, measured at fair value - Non-Agency

$ 362,002

$ 331,218

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Weighted Average

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Yield (percentage)

8.10%

6.56%

Discount rate (percentage)

6.04%

4.81%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Weighted Average | VIE assets, measured at fair value(1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Yield (percentage)

6.85%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Weighted Average | CML, HFS, measured at fair value - Agency

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Discount rate (percentage)

6.04%

4.81%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Minimum

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Yield (percentage)

6.42%

Discount rate (percentage)

4.81%

4.07%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Minimum | VIE assets, measured at fair value(1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Yield (percentage)

4.04%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Minimum | CML, HFS, measured at fair value - Agency

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Discount rate (percentage)

4.81%

4.07%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Maximum

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Yield (percentage)

7.25%

Discount rate (percentage)

7.54%

6.28%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Maximum | VIE assets, measured at fair value(1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Yield (percentage)

22.57%

Commercial mortgage loans, held for sale | Fair Value, Measurements, Recurring | Level III | Discounted Cash Flow | Maximum | CML, HFS, measured at fair value - Agency

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Discount rate (percentage)

7.54%

6.28%

[1]	Includes pledged assets of $647.9 million and $855.2 million as of September 30, 2026 and December 31, 2025, respectively.