Loans - Variable Rate Loans Held for Investment (Details) $ in Thousands	Mar. 31, 2025 USD ($)
Variable rate loans held-for-investment
Carrying Value	$ 15,784,825
Weighted-average Spread Above Index	3.60%
Commercial loans
Variable rate loans held-for-investment
Carrying Value	$ 13,063,501
Weighted-average Spread Above Index	3.60%
Infrastructure loans
Variable rate loans held-for-investment
Carrying Value	$ 2,721,324
Weighted-average Spread Above Index	3.80%