Dispositions of Real Estate and Discontinued Operations - Narrative (Details)	1 Months Ended		3 Months Ended				6 Months Ended
	Mar. 31, 2023 USD ($) property	Jan. 31, 2023 USD ($) property	Jun. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($) property	Jun. 30, 2022 USD ($) property	Mar. 31, 2022 USD ($) property	Jun. 30, 2023 USD ($) property	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net			$ 4,885,000		$ 10,340,000		$ 86,463,000	$ 14,196,000
Assets held for sale, net			8,282,000				8,282,000		$ 49,866,000
Impairment of real estate			0		$ 0		0	0
Planned MOB Demolition, Tenant Relocation and Other Costs
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expense on other								$ 14,000,000
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net			8,000,000				8,000,000		50,000,000
Liabilities related to assets held for sale, net									4,000,000
Total asset of discontinued operation									$ 0
Total liabilities of discontinued operation			$ 0				$ 0
Lab
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property		2				1
Proceeds from sale of buildings		$ 113,000,000				$ 14,000,000
Gain (loss) on sales of real estate, net		$ 60,000,000				$ 4,000,000
Lab | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale | property			1				1		2
Net real estate assets									$ 44,000,000
Outpatient Medical Buildings
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property	2			2	3
Proceeds from sale of buildings	$ 32,000,000			$ 9,000,000	$ 27,000,000
Gain (loss) on sales of real estate, net	$ 21,000,000			$ 1,000,000	$ 10,000,000
Outpatient Medical Land Parcel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property					1