Investments in Loans and Financing Receivables - Loans Receivables (Details) - Loans Receivable - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025	Mar. 31, 2026
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal Balance	$ 3,359.5	$ 1,721.3
Total Carrying Value	3,297.6	1,682.1	$ 2,672.2
Unfunded loan commitments	$ 375.4	$ 34.0
Weighted Average Term (Years)	3 years 8 months 8 days	4 years 6 months
Weighted Average Interest Rate	8.60%	8.80%
Accrued interest	$ 38.8	$ 27.8
Secured Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal Balance	1,629.6	1,250.4
Total Carrying Value	1,583.6	1,214.1
Unfunded loan commitments	$ 190.9	$ 0.0
Weighted Average Term (Years)	4 years 1 month 9 days	4 years 7 months 6 days
Weighted Average Interest Rate	8.40%	8.80%
Construction Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal Balance	$ 127.3
Total Carrying Value	128.4
Unfunded loan commitments	$ 136.8
Weighted Average Term (Years)	1 year 6 months 7 days
Weighted Average Interest Rate	8.20%
Mortgage Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal Balance	$ 341.6	$ 256.2
Total Carrying Value	342.1	256.2
Unfunded loan commitments	$ 24.3	$ 34.0
Weighted Average Term (Years)	4 years 2 months 4 days	5 years 1 month 6 days
Weighted Average Interest Rate	7.40%	7.60%
Unsecured and Mezzanine Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal Balance	$ 1,261.0	$ 214.7
Total Carrying Value	1,243.5	211.8
Unfunded loan commitments	$ 23.4	$ 0.0
Weighted Average Term (Years)	3 years 2 months 19 days	2 years 10 months 24 days
Weighted Average Interest Rate	9.10%	10.30%