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Debt - Mortgage Debt (Details) $ in Thousands	3 Months Ended
Debt - Mortgage Debt (Details) $ in Thousands	Mar. 31, 2025 USD ($) derivative_held facility obligation	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) facility	Aug. 31, 2022 derivative_held	Apr. 30, 2022 derivative_held
Debt Instrument
Principal balance on debt	$ 9,017,184
Number of interest-rate contracts held \| derivative_held	1
Letter of Credit
Debt Instrument
Number of obligations expiring \| obligation	17
Contractual obligation	$ 17,000
Cash Flow Hedging \| Designated as Hedging Instrument
Debt Instrument
Number of interest-rate contracts held \| derivative_held	2
Interest rate swap instruments \| Designated as Hedging Instrument
Debt Instrument
Number of interest-rate contracts held \| derivative_held				2
Interest rate swap instruments \| Cash Flow Hedging \| Designated as Hedging Instrument
Debt Instrument
Number of interest-rate contracts held \| derivative_held					2
Outpatient Medical Buildings \| Secured Debt
Debt Instrument
Property count \| facility	13
Aggregate principal amount	$ 142,000
Outpatient medical \| Secured Debt
Debt Instrument
Property count \| facility	1
Debt instrument, periodic payment	$ 4,000
Secured Debt
Debt Instrument
Principal balance on debt	351,378		$ 356,000
Debt instrument, collateral, healthcare facilities carrying value	749,000		$ 770,000
Debt instrument, periodic payment	$ 5,000	$ 1,000
Secured Debt \| Outpatient Medical Buildings
Debt Instrument
Property count \| facility	18		19
Secured Debt \| CCRC
Debt Instrument
Property count \| facility	2		2