Fair Value Measurements - Items Measured at Fair Value on a Non-Recurring Basis (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) property	Jun. 30, 2023 USD ($) property	Jun. 30, 2024 USD ($) property	Jun. 30, 2023 USD ($) property
Provisions for impairment
Less: total provisions for impairment	$ (96,458)	$ (29,815)	$ (185,947)	$ (42,993)
Number of properties:
Number of impaired properties held for sale | property	24	0	26	1
Number of impaired properties held for investment | property	41	7	50	8
Number of impaired properties sold | property	33	27	53	47
Provision for credit losses	$ 9,300		$ 10,500
Properties impaired 2022
Provisions for impairment
Carrying value prior to impairment	281,900	$ 97,000	443,900	$ 125,500
Less: total provisions for impairment	(87,200)	(29,800)	(175,400)	(43,000)
Carrying value after impairment	194,700	$ 67,200	268,500	$ 82,500
Number of properties:
Provision for credit losses	$ (9,300)		$ (10,500)
Number Of properties leased | property			17
Properties impaired 2022 | Office properties
Number of properties:
Number of properties acquired | property			2