SCHEDULE IV MORTGAGE LOANS ON REAL ESTATE - Summary (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) property item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Mortgage loans on real estate
Number of properties | property	41
Number of beds/units | item	3,699
Interest rate (as a percent)	7.25%
Balloon Amount	$ 368,520
Current Monthly Debt Service	3,073
Face amount of originated mortgages	400,025
Carrying Amount of Mortgages	389,728	$ 344,442	$ 257,251	$ 254,099
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Loan Term	4 years
Number of Assisted Communities | item	13
Michigan | Mortgage Loans on Real Estate Maturing in 2043 | Property with 1875 Beds/Units
Mortgage loans on real estate
Number of properties | property	15
Number of beds/units | item	1,875
Interest rate (as a percent)	10.60%
Balloon Amount	$ 163,214
Current Monthly Debt Service	1,623
Face amount of originated mortgages	190,214
Carrying Amount of Mortgages	$ 182,514
Michigan | Mortgage Loans on Real Estate Maturing in 2045 | Property with 501 Beds/Units
Mortgage loans on real estate
Number of properties | property	4
Number of beds/units | item	480
Interest rate (as a percent)	9.60%
Balloon Amount	$ 35,576
Current Monthly Debt Service	311
Face amount of originated mortgages	39,406
Carrying Amount of Mortgages	$ 38,636
Michigan | Mortgage Loans on Real Estate Maturing in 2045 | Property with 146 Beds/Units
Mortgage loans on real estate
Number of properties | property	1
Number of beds/units | item	146
Interest rate (as a percent)	10.10%
Balloon Amount	$ 14,325
Current Monthly Debt Service	125
Face amount of originated mortgages	15,000
Carrying Amount of Mortgages	$ 14,726
Michigan | Mortgage Loans on Real Estate Maturing in 2045 | Property with 205 Beds/Units
Mortgage loans on real estate
Number of properties | property	2
Number of beds/units | item	201
Interest rate (as a percent)	9.80%
Balloon Amount	$ 19,750
Current Monthly Debt Service	162
Face amount of originated mortgages	19,750
Carrying Amount of Mortgages	19,553
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Florida | Mortgage Loans on Real Estate Maturing in 2025 | Property with 68 Beds/Units
Mortgage loans on real estate
Number of properties | property	1
Number of beds/units | item	68
Interest rate (as a percent)	7.80%
Balloon Amount	$ 14,308
Current Monthly Debt Service	92
Face amount of originated mortgages	14,308
Carrying Amount of Mortgages	14,165
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Louisiana | Mortgage Loans on Real Estate Maturing in 2024 | Property with 189 Beds/Units
Mortgage loans on real estate
Number of properties | property	1
Number of beds/units | item	189
Interest rate (as a percent)	7.50%
Balloon Amount	$ 29,346
Current Monthly Debt Service	186
Face amount of originated mortgages	29,346
Carrying Amount of Mortgages	29,054
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Missouri | Mortgage Loans on Real Estate Maturing in 2022
Mortgage loans on real estate
Interest rate (as a percent)	7.50%
Balloon Amount	$ 1,887
Current Monthly Debt Service	12
Face amount of originated mortgages	1,887
Carrying Amount of Mortgages	1,867
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
North Carolina | Mortgage Loans on Real Estate Maturing in 2025 | Property with 478 Beds/Units
Mortgage loans on real estate
Number of properties | property	12
Number of beds/units | item	478
Interest rate (as a percent)	7.30%
Balloon Amount	$ 51,531
Current Monthly Debt Service	318
Face amount of originated mortgages	51,531
Carrying Amount of Mortgages	51,016
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
South Carolina | Mortgage Loans on Real Estate Maturing in 2025 | Property with 45 Beds/Units
Mortgage loans on real estate
Number of properties | property	1
Number of beds/units | item	45
Interest rate (as a percent)	7.30%
Balloon Amount	$ 4,787
Current Monthly Debt Service	30
Face amount of originated mortgages	4,787
Carrying Amount of Mortgages	4,739
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Minimum
Mortgage loans on real estate
Interest rate (as a percent)		4.00%
Maximum
Mortgage loans on real estate
Interest rate (as a percent)		8.00%
Loan Term	4 years
Mortgage Loans | North Carolina
Mortgage loans on real estate
Interest rate (as a percent)	7.30%
Balloon Amount	$ 796
Current Monthly Debt Service	5
Face amount of originated mortgages	796
Carrying Amount of Mortgages	788
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
Mortgage Loans | North Carolina | Property with 217 Beds/Units
Mortgage loans on real estate
Number of properties | property	4
Number of beds/units | item	217
Interest rate (as a percent)	7.30%
Balloon Amount	$ 33,000
Current Monthly Debt Service	209
Face amount of originated mortgages	33,000
Carrying Amount of Mortgages	32,670
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0