Real Property Acquisitions and Development - Narrative (Details) - Definitive Agreement To Acquire Property $ in Thousands	Jun. 30, 2021 USD ($) property	Jun. 21, 2021 USD ($) property
Business Acquisition [Line Items]
Number of properties | property	86
Total contingent purchase obligations | $	$ 1,576,800
Holiday Retirement
Business Acquisition [Line Items]
Number of properties | property		86
Total contingent purchase obligations | $		$ 1,576,800