Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets:
Investments in real estate debt	$ 7,574,239	$ 8,001,703
Real estate loans held by consolidated securitization vehicles, at fair value	16,968,906	17,030,387
Equity securities	553,564	530,119
Investments in unconsolidated entities	4,564,515	4,947,251
Interest rate and foreign currency hedging derivatives	2,895,335	3,033,595
Liabilities:
Senior obligations of consolidated securitization vehicles, at fair value	15,293,379	15,288,598
Interest rate and foreign currency hedging derivatives	32,817	50,557
Recurring
Assets:
Investments in real estate debt	7,574,239	8,001,703
Real estate loans held by consolidated securitization vehicles, at fair value	16,968,906	17,030,387
Equity securities	553,564	530,119
Investments in unconsolidated entities	4,564,515	4,947,251
Interest rate and foreign currency hedging derivatives	2,895,335	3,033,595
Total	32,556,559	33,543,055
Liabilities:
Senior obligations of consolidated securitization vehicles, at fair value	15,293,379	15,288,598
Interest rate and foreign currency hedging derivatives	32,817	50,557
Total	15,326,196	15,339,155
Recurring | Level 1
Assets:
Investments in real estate debt	0	0
Real estate loans held by consolidated securitization vehicles, at fair value	0	0
Equity securities	60,157	52,512
Investments in unconsolidated entities	0	0
Interest rate and foreign currency hedging derivatives	0	0
Total	60,157	52,512
Liabilities:
Senior obligations of consolidated securitization vehicles, at fair value	0	0
Interest rate and foreign currency hedging derivatives	0	0
Total	0	0
Recurring | Level 2
Assets:
Investments in real estate debt	6,150,448	6,460,520
Real estate loans held by consolidated securitization vehicles, at fair value	16,968,906	17,030,387
Equity securities	268,999	253,199
Investments in unconsolidated entities	0	0
Interest rate and foreign currency hedging derivatives	2,895,335	3,033,595
Total	26,283,688	26,777,701
Liabilities:
Senior obligations of consolidated securitization vehicles, at fair value	15,293,379	15,288,598
Interest rate and foreign currency hedging derivatives	32,817	50,557
Total	15,326,196	15,339,155
Recurring | Level 3
Assets:
Investments in real estate debt	1,423,791	1,541,183
Real estate loans held by consolidated securitization vehicles, at fair value	0	0
Equity securities	224,408	224,408
Investments in unconsolidated entities	4,564,515	4,947,251
Interest rate and foreign currency hedging derivatives	0	0
Total	6,212,714	6,712,842
Liabilities:
Senior obligations of consolidated securitization vehicles, at fair value	0	0
Interest rate and foreign currency hedging derivatives	0	0
Total	$ 0	$ 0