Indebtedness - Narrative (Details)	1 Months Ended										3 Months Ended	12 Months Ended
	Dec. 31, 2025 USD ($) option property	Oct. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) property	Jun. 30, 2025 USD ($) property option	May 31, 2025 USD ($) property	Apr. 30, 2025 USD ($) property	Mar. 31, 2025 USD ($) property	Nov. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) property option	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Feb. 23, 2026 USD ($)	May 31, 2024 USD ($) property
Debt Instrument
Number of properties owned (property) | property	298											298
Secured revolving credit facility	$ 0											$ 0	$ 0
Proceeds from issuance of senior secured notes, net												369,375,000	0	$ 750,001,000
Loss on modification or early extinguishment of debt												$ 42,526,000	324,000	2,468,000
Number of encumbered properties disposed | property												35
Senior Unsecured Notes
Debt Instrument
Principal amount of debt	1,600,000,000											$ 1,600,000,000	1,980,000,000
Unsecured Debt, Not Guaranteed
Debt Instrument
Principal amount of debt	1,100,000,000											1,100,000,000
Senior Unsecured Notes 4.375 Percent Due 2031 | Senior Unsecured Notes
Debt Instrument
Principal amount of debt	$ 500,000,000											$ 500,000,000	500,000,000
Interest rate (as a percent)	4.375%											4.375%
Senior secured notes, zero coupon rate, due 2026 | Secured Debt
Debt Instrument
Principal amount of debt										$ 940,534,000				$ 940,534,000
Interest rate (as a percent)	0.00%	0.00%	0.00%				0.00%				0.00%	0.00%
Equity interest in each collateral guarantee												100.00%
Accreted value increase rate	11.25%											11.25%
Amortization of debt discount												$ 63,241,000	86,778,000
Proceeds from debt										$ 730,359,000
Redemption of senior notes			$ 307,006,000
Outstanding Principal Balance	$ 324,121,000	$ 334,370,000	641,376,000				$ 940,534,000				$ 641,376,000	$ 324,121,000
Loss on modification or early extinguishment of debt	$ 1,881,000	$ 257,000	11,191,000				29,071,000				11,191,000
Number of real estate properties released | property												45
Mortgage Notes 6.86 Percent Due June 2034 | Secured Debt
Debt Instrument
Principal amount of debt																$ 120,000,000
Interest rate (as a percent)	6.86%											6.86%				6.864%
Mortgage Notes 6.86 Percent Due June 2034 | Secured Debt | Medical Office And Life Science
Debt Instrument
Number of properties owned (property) | property																8
Floating Rate Mortgage Note 6.82 Percent Due March 2028 | Secured Debt
Debt Instrument
Principal amount of debt							$ 140,000,000
Interest rate (as a percent)	6.19%											6.19%
Basis points per annum (as a percent)							2.50%					2.50%
Number of extension options | option	2											2
Extension term												6 months
Floating Rate Mortgage Note 6.82 Percent Due March 2028 | Secured Debt | Senior Living Communities
Debt Instrument
Number of properties owned (property) | property							14
Mortgage Notes 6.22 Percent Due May 2035 | Secured Debt
Debt Instrument
Principal amount of debt						$ 108,873,000
Interest rate (as a percent)	6.22%					6.22%						6.22%
Mortgage Notes 6.22 Percent Due May 2035 | Secured Debt | Senior Living Communities
Debt Instrument
Number of properties owned (property) | property						7
Mortgage Notes 6.57 Percent Due June 2030 | Secured Debt
Debt Instrument
Principal amount of debt					$ 64,000,000
Interest rate (as a percent)	6.57%				6.57%							6.57%
Mortgage Notes 6.57 Percent Due June 2030 | Secured Debt | Senior Living Communities
Debt Instrument
Number of properties owned (property) | property					4
Mortgage Notes 6.36 Percent Due June 2035 | Secured Debt
Debt Instrument
Principal amount of debt					$ 30,284,000
Interest rate (as a percent)	6.36%				6.36%							6.36%
Mortgage Notes 6.36 Percent Due June 2035 | Secured Debt | Senior Living Communities
Debt Instrument
Number of properties owned (property) | property					2
Senior unsecured notes, 9.750% coupon rate, due 2025 | Senior Unsecured Notes
Debt Instrument
Principal amount of debt	$ 0											$ 0	$ 380,000,000
Interest rate (as a percent)	9.75%			9.75%	9.75%	9.75%		9.75%	9.75%			9.75%
Outstanding Principal Balance				$ 100,000,000	$ 240,000,000	$ 380,000,000		$ 440,000,000	$ 500,000,000
Loss on modification or early extinguishment of debt				0	$ 44,000	$ 82,000		$ 115,000	$ 209,000
Secured Revolving Credit Facility Due 2029 | Secured Debt
Debt Instrument
Interest rate (as a percent)	6.47%											6.47%
Unsecured revolving credit facility, maximum borrowing capacity	$ 150,000,000			$ 150,000,000								$ 150,000,000
Number of extension options | option				2
Extension term				6 months
Net leverage ratio	2.50%											2.50%
Secured revolving credit facility	$ 0											$ 0
Remaining borrowing capacity	$ 150,000,000											$ 150,000,000
Secured Revolving Credit Facility Due 2029 | Secured Debt | Subsequent Event
Debt Instrument
Secured revolving credit facility															$ 0
Remaining borrowing capacity															$ 150,000,000
Secured Revolving Credit Facility Due 2029 | Secured Debt | Minimum
Debt Instrument
Basis points per annum (as a percent)				2.50%
Unused commitment fee percentage				0.25%
Secured Revolving Credit Facility Due 2029 | Secured Debt | Maximum
Debt Instrument
Basis points per annum (as a percent)				3.00%
Unused commitment fee percentage				0.35%
Secured Revolving Credit Facility Due 2029 | Secured Debt | Senior Living Communities
Debt Instrument
Number of properties owned (property) | property				14
Senior secured notes, 7.250% coupon rate, due 2030 | Secured Debt
Debt Instrument
Principal amount of debt			$ 375,000,000								$ 375,000,000
Interest rate (as a percent)	7.25%		7.25%								7.25%	7.25%
Equity interest in each collateral guarantee												100.00%
Proceeds from issuance of senior secured notes, net			$ 364,726,000
Number of real estate properties released | property			15