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Dispositions of Real Estate (Details)	1 Months Ended			3 Months Ended						9 Months Ended
Dispositions of Real Estate (Details)	Oct. 31, 2026 USD ($) property	Jul. 31, 2026 USD ($) property states	Jul. 31, 2024 USD ($) property	Sep. 30, 2026 USD ($) property	Jun. 30, 2026 USD ($) property	Mar. 31, 2026 USD ($) property	Dec. 31, 2025 USD ($) property	Sep. 30, 2025 USD ($) property	Jun. 30, 2025 USD ($) property	Sep. 30, 2026 USD ($) property	Sep. 30, 2025 USD ($)	Nov. 03, 2026 property
Disposal Group, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net				$ 0				$ 11,500,000		$ 60,657,000	$ 13,136,000
Assets held for sale				48,042,000			$ 80,621,000			48,042,000
Right-of-use asset				393,382,000			412,198,000			393,382,000
Lease liability				288,386,000			296,260,000			288,386,000
Deferred revenue				1,039,166,000			985,307,000			1,039,166,000
Impairment of real estate				0				0		0	$ 0
Held-for-sale
Disposal Group, Including Discontinued Operations [Line Items]
Assets held for sale				48,000,000			81,000,000			48,000,000
Liabilities related to assets held for sale, net				$ 1,000,000			12,000,000			$ 1,000,000
Real estate held for development and sale, net							73,000,000
Right-of-use asset							7,000,000
Lease liability							9,000,000
Deferred revenue							3,000,000
Brookefield JV
Disposal Group, Including Discontinued Operations [Line Items]
Property count \| property		86
Number of states in which properties located \| states		11
Ownership interest (in percent)		49.00%
Joint venture, gross valuation		$ 2,100,000,000
Joint venture, net annual return rate		6.50%
Dispositions Of 2026
Disposal Group, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net					$ 10,000,000	$ 51,000,000
Dispositions Of 2025
Disposal Group, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net							$ 57,000,000	$ 12,000,000	$ 3,000,000
Lab \| Held-for-sale
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property						4
Number of properties classified as held for sale \| property				2			6			2
Lab \| Dispositions Of 2026
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property						4
Proceeds from sale of property						$ 68,000,000
Lab \| Dispositions Of 2026 \| Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property	2
Outpatient Medical Buildings
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property			59
Proceeds from sale of property			$ 674,000,000
Outpatient Medical Buildings \| Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Property count \| property												8
Outpatient Medical Buildings \| Held-for-sale
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property					1
Number of properties classified as held for sale \| property				3			2			3
Outpatient Medical Buildings \| Held-for-sale \| Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property	2
Outpatient Medical Buildings \| Dispositions Of 2026
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property					2	2
Proceeds from sale of property					$ 34,000,000	$ 15,000,000
Outpatient Medical Buildings \| Dispositions Of 2026 \| Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Proceeds from sale of property	$ 31,000,000
Outpatient Medical Buildings \| Dispositions Of 2025
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property								2
Proceeds from sale of property								$ 27,000,000
Outpatient Medical Buildings \| GEORGIA \| Dispositions Of 2026
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property						9
Proceeds from sale of property						$ 7,000,000
Senior Housing Communities \| Dispositions Of 2026
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property					1
Proceeds from sale of property					$ 23,000,000
Land Parcel \| Dispositions Of 2025
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property									1
Proceeds from sale of property									$ 4,000,000
Nine Outpatient Medical Buildings \| Dispositions Of 2025
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property							7
Proceeds from sale of property							$ 133,000,000
Sixteen Outpatient Medical Buildings \| Dispositions Of 2025
Disposal Group, Including Discontinued Operations [Line Items]
Number of properties sold \| property							16
Proceeds from sale of property							$ 182,000,000