Secured Debt, Net - Schedule of All in Cost of Secured Credit Facilities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2025	Dec. 31, 2024
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
Total borrowings	$ 13,037,822
Secured debt, net \| Secured debt, net
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	2,200,000
Collateral	2,900,000
Secured debt, net \| Secured debt, net \| Secured credit facilities
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	2,183,266	$ 614,141
Total borrowings	$ 9,548,332	$ 9,705,529
Wtd. avg. all-in cost (percentage)	1.82%	1.92%
Collateral	$ 14,083,177	$ 14,807,821
Wtd. avg. all-in yield (percentage)	3.35%	3.58%
Net interest margin (percentage)	1.53%	1.66%
Secured debt, net \| Secured debt, net \| Secured credit facilities \| + 1.50% or less
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 1,385,800	$ 165,616
Total borrowings	$ 4,547,118	$ 3,976,192
Wtd. avg. all-in cost (percentage)	1.54%	1.53%
Collateral	$ 6,600,493	$ 6,185,925
Wtd. avg. all-in yield (percentage)	2.99%	3.18%
Net interest margin (percentage)	1.45%	1.65%
Secured debt, net \| Secured debt, net \| Secured credit facilities \| + 1.51% to + 1.75%
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 555,478	$ 74,118
Total borrowings	$ 2,564,711	$ 2,238,376
Wtd. avg. all-in cost (percentage)	1.75%	1.78%
Collateral	$ 3,375,095	$ 3,140,937
Wtd. avg. all-in yield (percentage)	3.48%	3.52%
Net interest margin (percentage)	1.73%	1.74%
Secured debt, net \| Secured debt, net \| Secured credit facilities \| + 1.76% to + 2.00%
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 104,841	$ 0
Total borrowings	$ 935,067	$ 969,541
Wtd. avg. all-in cost (percentage)	2.10%	2.09%
Collateral	$ 1,766,876	$ 1,802,431
Wtd. avg. all-in yield (percentage)	3.28%	3.67%
Net interest margin (percentage)	1.18%	1.58%
Secured debt, net \| Secured debt, net \| Secured credit facilities \| + 2.01% or more
Schedule Of All In Cost Of Secured Credit Facilities [Line Items]
New Financings	$ 137,147	$ 374,407
Total borrowings	$ 1,501,436	$ 2,521,420
Wtd. avg. all-in cost (percentage)	2.63%	2.61%
Collateral	$ 2,340,713	$ 3,678,528
Wtd. avg. all-in yield (percentage)	4.24%	4.31%
Net interest margin (percentage)	1.61%	1.70%