Consolidated Securitization Vehicles - Real Estate Loans and Related Senior Obligations of Consolidated Securitization Vehicles (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Transfers and Servicing [Abstract]
Real estate loans held by consolidated securitization vehicles, count | loan	291	292
Senior obligations of consolidated securitization vehicles, count | loan	21	22
Real estate loans held by consolidated securitization vehicles in excess of senior obligations of consolidated securitization vehicles, count | loan	21	22
Real estate loans held by consolidated securitization vehicles, at principal value	$ 16,551,341	$ 17,527,441
Senior obligations of consolidated securitization vehicles, at principal value	14,835,899	15,565,671
Real estate loans held by consolidated securitization vehicles in excess of senior obligations of consolidated securitization vehicles, at principal value	1,715,442	1,961,770
Real estate loans held by consolidated securitization vehicles, at fair value	16,331,578	17,030,387
Senior obligations of consolidated securitization vehicles, at fair value	14,777,146	15,288,598
Real estate loans held by consolidated securitization vehicles in excess of senior obligations of consolidated securitization vehicles, at fair value	$ 1,554,432	$ 1,741,789
Real estate loans held by consolidated securitization vehicles, weighted average yield	6.30%	5.10%
Senior obligations of consolidated securitization vehicles, weighted average cost	6.10%	4.90%
Real estate loans held by consolidated securitization vehicles in excess of senior obligations of consolidated securitization vehicles, weighted average yield and cost	7.80%	6.60%