Use of Special Purpose Entities (SPE) and Variable Interest Entities (VIE) - Narrative (Details)	3 Months Ended
Mar. 31, 2026 USD ($) securitization	Mar. 31, 2025 USD ($) securitization	Dec. 31, 2025 USD ($) securitization
Variable Interest Entity [Line Items]
Number of securitizations completed \| securitization	1	2
Proceeds from securitizations of loans held-for-investment	$ 308,500,000	$ 326,300,000
Number of securitizations optional redemption right exercised \| securitization	2	1
Proceeds from residential loan securitization redemption (approximately)	$ 233,900,000	$ 54,400,000
Gain (loss) on extinguishment of debt	$ (985,000)	$ 0
VIE, Primary Beneficiary \| Consolidated SLST
Variable Interest Entity [Line Items]
Number of securitization trusts \| securitization	3		3
VIE, Primary Beneficiary \| Consolidated SLST \| Level 3
Variable Interest Entity [Line Items]
Variable interest entity, primary beneficiary, maximum loss exposure, amount	$ 146,700,000		$ 151,500,000
Residential loans held in securitization trusts
Variable Interest Entity [Line Items]
Gain (loss) on extinguishment of debt	$ 0

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Number Of Securitizations Completed

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Number Of Securitizations Optional Redemption Right Exercised

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The cash inflow from the securitization of loans held for investment. Securitization is the structured process whereby interests in loans and other receivables are packaged, underwritten, and sold in the form of asset-backed securities.

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