Summary of Significant Accounting Policies - Deferred Leasing Costs and Revenue Recognition (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) community	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
DEFERRED LEASING COSTS
Unamortized gross balance of deferred leasing costs	$ 59,286,000	$ 62,980,000
Accumulated amortization	$ 22,377,000	19,985,000
Weighted average amortization period for deferred leasing cost	7 years 9 months 18 days
Expected amortization expense for the five years
Expected amortization expense, 2025	$ 6,799,000
Expected amortization expense, 2026	6,280,000
Expected amortization expense, 2027	5,199,000
Expected amortization expense, 2028	4,418,000
Expected amortization expense, 2029	3,238,000
Expected amortization expense, thereafter	10,975,000
Percentage rents earned	3,435,000	2,949,000	$ 2,978,000
Proceeds from the relief fund amount	0	1,581,000	605,000
Interest and other income	8,950,000	15,536,000	15,929,000
Provider relief fund other liabilities	0
Operating Segments | SHOP
Expected amortization expense for the five years
Interest and other income	$ 0	$ 1,581,000	$ 4,327,000
Senior Living Communities | Third Party Managers
Expected amortization expense for the five years
Number of communities managed | community	232