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Amount of reserve for preferred equity investment.

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Investment in Unconsolidated Joint Ventures - Investment (Details)	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2020 USD ($) item property	Sep. 30, 2021 USD ($) property item	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) item property	Oct. 29, 2021 property
Investment in Unconsolidated Joint Ventures
Carrying Value	$ 11,340,000	$ 19,340,000		$ 11,340,000
Income Recognized		$ 1,041,000	$ 287,000
Cash Interest Received			249,000
Liquidation proceeds			17,758,000
Subsequent Event
Investment in Unconsolidated Joint Ventures
Number of beds/units \| property					11
Joint Venture
Investment in Unconsolidated Joint Ventures
Number of properties owned by joint venture for sale \| property	4			4
Liquidation proceeds				$ 17,848,000
Amount of gains (losses) on liquidation	$ 138,000		(620,000)
Joint Venture \| Preferred Equity Investment \| Arizona
Investment in Unconsolidated Joint Ventures
Number of properties owned by joint venture \| property		4
Joint Venture \| Not primary beneficiary
Investment in Unconsolidated Joint Ventures
Capital Contributions		$ 8,000,000	6,398,000
Income Recognized		1,041,000	287,000
Cash Interest Received		916,000	249,000
Preferred Equity Investment \| Joint Venture \| Not primary beneficiary
Investment in Unconsolidated Joint Ventures
Carrying Value		19,340,000
Combination ALF, MC, ILF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary
Investment in Unconsolidated Joint Ventures
Capital Contributions			58,000
Income Recognized			231,000
Cash Interest Received			231,000
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary
Investment in Unconsolidated Joint Ventures
Number of beds/units \| item	95			95
Capital Contributions			6,340,000	$ 6,340,000
Income Recognized		337,000	56,000
Cash Interest Received		$ 300,000	$ 18,000
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington
Investment in Unconsolidated Joint Ventures
Preferred return percentage		12.00%
Contractual cash portion		7.00%
Number of beds/units \| item		95
Carrying Value		$ 6,340,000
Reserve withheld		$ 1,425,000
Percentage of Investment		15.50%
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| Internal Rate of Return is Until Eight Percent
Investment in Unconsolidated Joint Ventures
Percentage of cash return		8.00%
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| Internal Rate of Return is Until Eight Percent \| Minimum
Investment in Unconsolidated Joint Ventures
Percentage of cash return		7.00%
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| Internal Rate of Return is Until Eight Percent \| Maximum
Investment in Unconsolidated Joint Ventures
Percentage of cash return		9.00%
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| The Internal Rate of Return is Between Twelve and Fourteen Percent \| Minimum
Investment in Unconsolidated Joint Ventures
Percentage of cash return		12.00%
Combination ALF/MC \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| The Internal Rate of Return is Between Twelve and Fourteen Percent \| Maximum
Investment in Unconsolidated Joint Ventures
Percentage of cash return		14.00%
Combination ILF/ALF \| Joint Venture \| Not primary beneficiary \| Preferred Equity Investment \| Washington
Investment in Unconsolidated Joint Ventures
Reserve withheld		$ 2,324
Combination ILF/ALF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary
Investment in Unconsolidated Joint Ventures
Capital Contributions		8,000,000
Income Recognized		704,000
Cash Interest Received		$ 616,000
Combination ILF/ALF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington
Investment in Unconsolidated Joint Ventures
Preferred return percentage		12.00%
Contractual cash portion		8.00%
Number of beds/units \| item		267
Carrying Value		$ 13,000,000
Reserve withheld		$ 3,777,000
Percentage of Investment		11.60%
Additional preferred capital contributions in joint venture committed		$ 8,000,000
Amount of joint venture investment		13,000,000
Reserve for preferred equity investment		$ 3,777
Combination ILF/ALF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| Internal Rate of Return is Until Eight Percent
Investment in Unconsolidated Joint Ventures
Percentage of cash return		8.00%
Combination ILF/ALF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| The Internal Rate of Return is Between Twelve and Fourteen Percent \| Minimum
Investment in Unconsolidated Joint Ventures
Percentage of Investment		12.00%
Combination ILF/ALF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Washington \| The Internal Rate of Return is Between Twelve and Fourteen Percent \| Maximum
Investment in Unconsolidated Joint Ventures
Percentage of Investment		14.00%
Combination ILF/ALF \| Preferred Equity Investment \| Joint Venture \| Not primary beneficiary \| Preferred Equity Investment \| Washington
Investment in Unconsolidated Joint Ventures
Additional preferred capital contributions in joint venture committed		$ 8,000