Fair Value of Financial Instruments - Schedule of Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Equity Securities $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)
NexPoint Storage Partners
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 24,761
Additions	0
Change in Unrealized Gains/(Losses)	131
Ending Balance	24,892
Private REIT
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	24,343
Additions	0
Change in Unrealized Gains/(Losses)	3,625
Ending Balance	27,968
IQHQ Inc.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	141,186
Additions	0
Change in Unrealized Gains/(Losses)	(4,447)
Ending Balance	136,739
IQHQ Inc. \| Series D Preferred Stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	18,617
Additions	0
Change in Unrealized Gains/(Losses)	(1)
Ending Balance	18,616
IQHQ Inc. \| Series E Preferred Stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	136,115
Additions	0
Change in Unrealized Gains/(Losses)	(34)
Ending Balance	136,081
FREMF 2020-KF81 C
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	4,005,397
Additions	0
Change in Unrealized Gains/(Losses)	(249,172)
Ending Balance	3,756,225
NSP \| Series G Preferred Stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	3,161
Additions	108
Change in Unrealized Gains/(Losses)	0
Ending Balance	$ 3,269