Secured Debt, Net - Schedule of All in Cost of Secured Credit Facilities (Details) - Secured credit facilities - Line of Credit - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 69,306	$ 3,350,146
Total Borrowings	$ 13,451,427	$ 13,549,748
Wtd. Avg. All-in Cost (percentage)	1.89%	1.85%
Collateral	$ 19,350,114	$ 19,694,790
Wtd. Avg. All-in Yield (percentage)	3.68%	3.70%
Net Interest Margin (percentage)	1.79%	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	$ 5,948,547	$ 7,433,204
Wtd. Avg. All-in Cost (percentage)	1.54%	1.53%
Collateral	$ 8,579,535	$ 10,465,647
Wtd. Avg. All-in Yield (percentage)	3.27%	3.24%
Net Interest Margin (percentage)	1.73%	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	$ 2,968,963	$ 2,246,223
Wtd. Avg. All-in Cost (percentage)	1.83%	1.88%
Collateral	$ 4,194,995	$ 3,538,815
Wtd. Avg. All-in Yield (percentage)	3.57%	3.73%
Net Interest Margin (percentage)	1.74%	1.85%
+ 1.76% to + 2.00%
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 0	$ 405,723
Total Borrowings	$ 1,919,615	$ 1,514,541
Wtd. Avg. All-in Cost (percentage)	2.13%	2.16%
Collateral	$ 2,977,246	$ 2,483,240
Wtd. Avg. All-in Yield (percentage)	4.02%	4.14%
Net Interest Margin (percentage)	1.89%	1.98%
+ 2.01% or more
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 69,306	$ 1,246,650
Total Borrowings	$ 2,614,302	$ 2,355,780
Wtd. Avg. All-in Cost (percentage)	2.61%	2.63%
Collateral	$ 3,598,338	$ 3,207,088
Wtd. Avg. All-in Yield (percentage)	4.59%	4.78%
Net Interest Margin (percentage)	1.98%	2.15%