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Fair Value of Financial Instruments - Schedule of Changes in Unrealized Gains (Losses) Included in Earnings for Level 3 Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Assets
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Unrealized gains (losses), net	Unrealized gains (losses), net
Liabilities
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Unrealized gains (losses), net	Unrealized gains (losses), net
Level 3 | Consolidated SLST | VIE, Primary Beneficiary
Assets
Unrealized gains (losses)	$ 12,895	$ 506
Residential loans | Level 3
Assets
Unrealized gains (losses)	(2,342)	(8,303)
Residential Loans Held in Securitization Trusts | Level 3
Assets
Unrealized gains (losses)	23,905	(4,362)
Multi-Family Loans | Level 3
Assets
Unrealized gains (losses)	410	(4,777)
Equity investments | Level 3
Assets
Unrealized gains (losses)	(1,363)	(6,161)
Mortgage servicing rights | Level 3
Assets
Unrealized gains (losses)	(706)	0
Collateralized Debt Obligations | Level 3 | Consolidated SLST | VIE, Primary Beneficiary
Liabilities
Unrealized gains (losses)	$ (9,631)	$ (542)

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