Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023 USD ($) property	Mar. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) property	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Significant Of Accounting Policies [Line Items]
Interest expense	$ (813,391)		$ (434,529)	$ (1,613,400)	$ (780,788)
Other income (expense)	(11,518)		322,817	15,542	425,504
Income (loss) from interest rate derivatives	536,236		632,846	(84,014)	1,308,636
Total assets	138,046,624			138,046,624		$ 142,687,424
Total liabilities	88,382,610			88,382,610		91,933,250
Net realized and unrealized loss on equity securities	(27,100)		327,400	(23,400)	452,500
Impairment of investments in real estate	105,216	$ 12,500	0	117,715	0
Real estate, held-for-sale	$ 211,400	36,900		$ 211,400
Impairment of properties held for sale		$ 12,500	0		0
Office Properties:
Significant Of Accounting Policies [Line Items]
Number of real estate properties related to impairment | property	1			1
Rental Housing and Office Properties
Significant Of Accounting Policies [Line Items]
Impairment of investments in real estate	$ 105,200			$ 105,200
Revision of Prior Period, Reclassification, Adjustment | Reclassification from Interest Expense
Significant Of Accounting Policies [Line Items]
Interest expense			18,800		58,600
Income (loss) from interest rate derivatives			18,800		58,600
Revision of Prior Period, Reclassification, Adjustment | Reclassification from Other Income (Expense)
Significant Of Accounting Policies [Line Items]
Other income (expense)			600,000		1,300,000
Income (loss) from interest rate derivatives			$ 600,000		$ 1,300,000
Minimum
Significant Of Accounting Policies [Line Items]
Award requisite service period (in years)				3 years
Maximum
Significant Of Accounting Policies [Line Items]
Award requisite service period (in years)				4 years
Level 3
Significant Of Accounting Policies [Line Items]
Mortgage notes, term loans, and secured revolving credit facilities, secured financings on investments in real estate debt, and unsecured revolving credit facilities	$ 1,400,000			$ 1,400,000		1,400,000
Level 3 | Minimum | Discount Rate | Discounted cash flow
Significant Of Accounting Policies [Line Items]
Other real estate owned, measurement input	0.068			0.068
Level 3 | Minimum | Exit Capitalization Rate | Discounted cash flow
Significant Of Accounting Policies [Line Items]
Other real estate owned, measurement input	0.052			0.052
Level 3 | Maximum | Discount Rate | Discounted cash flow
Significant Of Accounting Policies [Line Items]
Other real estate owned, measurement input	0.094			0.094
Level 3 | Maximum | Exit Capitalization Rate | Discounted cash flow
Significant Of Accounting Policies [Line Items]
Other real estate owned, measurement input	0.119			0.119
VIEs
Significant Of Accounting Policies [Line Items]
Total assets	$ 51,000,000			$ 51,000,000		52,100,000
Total liabilities	$ 37,300,000			$ 37,300,000		$ 37,800,000