Dispositions, Real Property Held for Sale and Impairment - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) property	Sep. 30, 2023 USD ($) property	Sep. 30, 2024 USD ($) property	Sep. 30, 2023 USD ($) property	Dec. 31, 2023 USD ($)	[1]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate held-for-sale	$ 110,689		$ 110,689		$ 372,883
Expected sale proceeds			131,558
Impairment of assets	23,421	$ 7,388	69,146	$ 21,103
Income (loss) from real estate dispositions, net			$ (62,121)	$ 64,266
Sold or Held for sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from real estate dispositions, net	$ (15,905)	$ (4,893)
Seniors Housing Operating
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Properties classified as held for sale | property	7		7
Number of properties | property	14	6	14	6
Triple-net
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Properties classified as held for sale | property	10		10
Number of properties | property	2	2	2	2

[1] The consolidated balance sheet at December 31, 2023 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.