Dispositions, Real Property Held for Sale and Impairment - Strategic Dissolution of Revera Joint Ventures (Details) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($) property joint_venture	Sep. 30, 2023 USD ($) property project	Jun. 30, 2023 USD ($) property joint_venture	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-cash consideration				$ 361,830	$ 0	$ 0
Gain (loss) on sale of properties				67,898	16,043	235,375
Net real estate investments				38,775,913	34,139,819
Impairment of assets held for sale				$ 15,401	$ 13,146	$ 19,567
U K Portfolio Revera Joint Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of joint ventures | joint_venture	2		2
U K Portfolio Revera Joint Venture1
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage	75.00%		75.00%
Proceeds from sale of interest	$ 107,341
U K Portfolio Revera Joint Venture2
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage	90.00%		90.00%
U S Portfolio Revera Joint Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		34.00%
Equity method investments		$ 47,734
U S Portfolio Revera Joint Venture | Revera
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		66.00%
Canadian Portfolio Revera Joint Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		75.00%
Number of real estate properties | property		85
Canadian Portfolio Revera Joint Venture | Revera
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage		25.00%
Revera Joint Venture Disposal Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property	4	13	31	14
Gross sale price	$ 222,521		$ 222,521
Non-cash consideration	241,728
Other consideration	198,837		198,837
Noncontrolling interest	42,891		42,891
Transaction related expenses	9,049
Real estate property	224,208	$ 119,258	224,208
Gain (loss) on sale of properties	(1,687)	62,075
Payment for transaction related expenses disposal group	5,776
Noncontrolling Interest, decrease from deconsolidation	180,497	$ 56,905
Liabilities	22,270		$ 22,270
Realized adjustment on disposal	$ 1,846
Number of projects | project		1
Impairment of assets held for sale				$ 28,708
Revera Joint Venture Disposal Transaction | Avery Healthcare
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property	29
Revera Joint Venture Disposal Transaction U S Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property		12
Revera Joint Venture Disposal Transaction Now Wholly Owned Properties | Oakmont Management Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property		2
Revera Joint Venture, Existing Wholly-Owned Properties | Oakmont Management Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property		26
Revera Joint Venture Acquisition Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties acquired | property	29	10	110	71
Payment for property acquired	$ 10,158
Net real estate investments		$ 479,525
Payments to acquire real estate and real estate joint ventures		31,456
Asset acquisition, consideration transferred		448,069
Asset acquisition debt assumed		$ 270,486