Secured Debt, Net - Schedule of All in Cost of Secured Credit Facilities (Details) - Secured credit facilities - Line of Credit - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 113,753	$ 3,350,146
Total Borrowings	$ 12,697,058	$ 13,549,748
Wtd. Avg. All-in Cost (percentage)	1.89%	1.85%
Collateral	$ 18,594,318	$ 19,694,790
Wtd. Avg. All-in Yield (percentage)	3.58%	3.70%
Net Interest Margin (percentage)	1.69%	1.85%
+ 1.50% or less
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 0	$ 1,329,508
Total Borrowings	$ 5,647,848	$ 7,433,204
Wtd. Avg. All-in Cost (percentage)	1.53%	1.53%
Collateral	$ 8,341,383	$ 10,465,647
Wtd. Avg. All-in Yield (percentage)	3.24%	3.24%
Net Interest Margin (percentage)	1.71%	1.71%
+ 1.51% to + 1.75%
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 0	$ 368,265
Total Borrowings	$ 2,679,699	$ 2,246,223
Wtd. Avg. All-in Cost (percentage)	1.82%	1.88%
Collateral	$ 3,723,365	$ 3,538,815
Wtd. Avg. All-in Yield (percentage)	3.49%	3.73%
Net Interest Margin (percentage)	1.67%	1.85%
+ 1.76% to + 2.00%
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 42,908	$ 405,723
Total Borrowings	$ 1,850,809	$ 1,514,541
Wtd. Avg. All-in Cost (percentage)	2.11%	2.16%
Collateral	$ 2,913,067	$ 2,483,240
Wtd. Avg. All-in Yield (percentage)	3.92%	4.14%
Net Interest Margin (percentage)	1.81%	1.98%
+ 2.01% or more
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 70,845	$ 1,246,650
Total Borrowings	$ 2,518,702	$ 2,355,780
Wtd. Avg. All-in Cost (percentage)	2.64%	2.63%
Collateral	$ 3,616,503	$ 3,207,088
Wtd. Avg. All-in Yield (percentage)	4.30%	4.78%
Net Interest Margin (percentage)	1.66%	2.15%