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Fair Value of Financial Instruments - Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)
Total ABS Issued
Liabilities
Beginning balance	$ 12,879,530
Acquisitions	1,625,956
Sales	0
Principal paydowns	(503,956)
Gains (losses) in net income (loss), net	126,144
Other settlements, net	0
Ending balance	14,127,674
Change in unrealized gains or (losses) for the period included in earnings for liabilities held at the end of the reporting period	97,883
Non-controlling interest
Liabilities
Beginning balance	99,510
Acquisitions	0
Sales	0
Principal paydowns	(1,187)
Gains (losses) in net income (loss), net	5,997
Other settlements, net	1,840
Ending balance	106,160
Change in unrealized gains or (losses) for the period included in earnings for liabilities held at the end of the reporting period	(4,640)
Residential Consumer Loans
Assets
Beginning balance	11,077,823
Acquisitions	2,383,197
Originations	0
Sales	(423,972)
Principal paydowns	(423,920)
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	139,976
Unrealized gains in OCI, net	0
Other settlements, net	(846)
Ending balance	12,752,258
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	132,299
Total Residential Investor Loans
Assets
Beginning balance	4,587,090
Acquisitions	6,800
Originations	454,362
Sales	(346,455)
Principal paydowns	(287,639)
Consolidation of securitized bridge loans	43,383
Gains (losses) in net income, net	(15,221)
Unrealized gains in OCI, net	0
Other settlements, net	(2,486)
Ending balance	4,439,834
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	(16,696)
Liabilities
Joint venture transferred	43,000
Consolidated Agency multifamily loans, at fair value
Assets
Beginning balance	424,597
Acquisitions	0
Originations	0
Sales	0
Principal paydowns	(2,294)
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	1,370
Unrealized gains in OCI, net	0
Other settlements, net	0
Ending balance	423,673
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	1,340
HEIs
Assets
Beginning balance	589,785
Acquisitions	0
Originations	1,834
Sales	0
Principal paydowns	(10,348)
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	19,048
Unrealized gains in OCI, net	0
Other settlements, net	67
Ending balance	600,386
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	18,495
Real Estate Trading Securities
Assets
Beginning balance	193,749
Acquisitions	8,359
Originations	0
Sales	(2,714)
Principal paydowns	(162)
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	(27,869)
Unrealized gains in OCI, net	0
Other settlements, net	0
Ending balance	171,363
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	(27,693)
Real Estate AFS Securities
Assets
Beginning balance	211,474
Acquisitions	844
Originations	0
Sales	(11,673)
Principal paydowns	(96)
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	681
Unrealized gains in OCI, net	3,372
Other settlements, net	0
Ending balance	204,602
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	3,422
Servicing Investments
Assets
Beginning balance	297,683
Acquisitions	0
Originations	0
Sales	0
Principal paydowns	1,956
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	(1,349)
Unrealized gains in OCI, net	0
Other settlements, net	0
Ending balance	298,290
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	(1,053)
Strategic Investments
Assets
Beginning balance	3,460
Acquisitions	0
Originations	0
Sales	0
Principal paydowns	0
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	0
Unrealized gains in OCI, net	0
Other settlements, net	0
Ending balance	3,460
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	0
Derivatives
Assets
Beginning balance	5,323
Acquisitions	0
Originations	0
Sales	0
Principal paydowns	0
Consolidation of securitized bridge loans	0
Gains (losses) in net income, net	31,254
Unrealized gains in OCI, net	0
Other settlements, net	(19,770)
Ending balance	16,807
Change in unrealized gains or (losses) for the period included in earnings for assets held at the end of the reporting period	$ 16,807

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