Financial Instruments and Fair Value Measurements - Items Measured at Fair Value on a Non-Recurring Basis (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) property
Provisions for impairment
Less: total provisions for impairment	$ (25,860)	$ (38,967)	$ (147,232)
Buildings and improvements	29,707,751	25,155,178
Properties impaired 2022
Provisions for impairment
Less: total provisions for impairment	(25,900)	(39,000)	(147,200)
Carrying value prior to impairment	140,900	169,200	260,800
Carrying value after impairment	$ 115,000	$ 130,200	$ 113,600
COVID Related Properties
Provisions for impairment
Number of impaired properties held for investment | property			38
Less: total provisions for impairment			$ (105,000)