Financial Instruments and Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Carrying value
Fair value of financial assets and liabilities
Mortgages payable assumed in connection with acquisitions	$ 842,100	$ 842,300
Notes and bonds payable	15,296,700	14,114,200
Estimated fair value
Fair value of financial assets and liabilities
Mortgages payable assumed in connection with acquisitions	820,000	810,400
Notes and bonds payable	13,833,500	12,522,800
Mortgages payable
Fair value of financial assets and liabilities
Unamortized net premiums	9,200	12,400
Deferred financing costs	700	800
Notes and bonds payable
Fair value of financial assets and liabilities
Unamortized net premiums	200,000	224,600
Deferred financing costs	66,300	$ 60,700
Basis adjustment on interest rate swap designated as fair value hedge	$ (400)