Debt and Preferred Equity Investments - Schedule of Roll Forward of our Total Allowance for Loan Losses (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) loan	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Loan loss reserve activity
Balance at beginning of year		$ 13,520	$ 13,520	$ 13,520	$ 6,630
Current period provision for loan loss			300	0	6,890
Initial allowance for credit losses on loans purchased with credit deterioration ("PCD")			99,039	0	0
Writeoffs of the allowance		(24,000)	(40,779)	0	0
Current period recoveries	$ (46,600)	$ (25,000)	(71,626)	0	0
Balance at end of year			454	13,520	$ 13,520
Commercial mortgage investment (in Percent)		100.00%
Initial allowance for credit losses on loans purchased with credit deterioration ("PCD")		$ 99,000
Loan modification amount		$ 10,000
Nonaccrual allowance writeoff			$ 13,400
Number of financing receivables on non-accrual without allowance for loan loss | loan			1
Debt and preferred equity investments			$ 168,358	303,726
Total floating rate
Loan loss reserve activity
Debt and preferred equity investments			128,026	117,160
Alternative strategy portfolio | Total floating rate
Loan loss reserve activity
Debt and preferred equity investments			$ 50,300	$ 53,500