Financial Instruments and Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Fair value of financial assets and liabilities
Provisions for impairment on real estate	$ 7,691	$ 17,246	$ 14,729	$ 19,966
Buildings and improvements	26,101,185		26,101,185		$ 25,155,178
Carrying value
Fair value of financial assets and liabilities
Mortgages payable assumed in connection with acquisitions	928,900		928,900		1,114,100
Notes and bonds payable	13,390,300		13,390,300		12,257,300
Estimated fair value
Fair value of financial assets and liabilities
Mortgages payable assumed in connection with acquisitions	906,600		906,600		1,154,700
Notes and bonds payable	12,377,800		12,377,800		13,114,500
Mortgages payable
Fair value of financial assets and liabilities
Unamortized net premiums	19,200		19,200		28,700
Deferred financing costs	1,000		1,000		790
Notes and bonds payable
Fair value of financial assets and liabilities
Unamortized net premiums	257,000		257,000		295,500
Deferred financing costs	$ 58,700		$ 58,700		$ 53,100