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Mortgage and Other Notes Receivable (Schedule of Financing Receivables By Credit Quality Indicator) (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross $ 305,162,000  
Financing Receivable, Allowance for Credit Loss (5,210,000) $ (4,946,000)
Loans and Leases Receivable, Net Amount 299,952,000 $ 292,427,000
Mortgages [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 230,927,000  
Mortgages [Member] | 2020 [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 29,523,000  
Mortgages [Member] | 2019    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 48,141,000  
Mortgages [Member] | 2018    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 138,932,000  
Mortgages [Member] | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 14,331,000  
Mortgages [Member] | EBITDARM Coverage above 1.5x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 177,860,000  
Mortgages [Member] | EBITDARM Coverage above 1.5x | 2020 [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 25,579,000  
Mortgages [Member] | EBITDARM Coverage above 1.5x | 2019    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 9,018,000  
Mortgages [Member] | EBITDARM Coverage above 1.5x | 2018    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 138,932,000  
Mortgages [Member] | EBITDARM Coverage above 1.5x | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 4,331,000  
Mortgages [Member] | EBITDARM Coverage, 1.0x to 1.5x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 0  
Mortgages [Member] | EBITDARM Coverage, 1.0x to 1.5x | 2020 [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 0  
Mortgages [Member] | EBITDARM Coverage, 1.0x to 1.5x | 2018    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 0  
Mortgages [Member] | EBITDARM Coverage Below 1.0x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 53,067,000  
Mortgages [Member] | EBITDARM Coverage Below 1.0x | 2020 [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 3,944,000  
Mortgages [Member] | EBITDARM Coverage Below 1.0x | 2019    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 39,123,000  
Mortgages [Member] | EBITDARM Coverage Below 1.0x | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 10,000,000  
Mezzanine    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 61,362,000  
Mezzanine | 2021 Member    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 35,953,000  
Mezzanine | 2019    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 750,000  
Mezzanine | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 24,659,000  
Mezzanine | EBITDARM Coverage above 1.5x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 13,727,000  
Mezzanine | EBITDARM Coverage above 1.5x | 2021 Member    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 3,568,000  
Mezzanine | EBITDARM Coverage above 1.5x | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 10,159,000  
Mezzanine | EBITDARM Coverage, 1.0x to 1.5x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 32,385,000  
Mezzanine | EBITDARM Coverage, 1.0x to 1.5x | 2021 Member    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 32,385,000  
Mezzanine | EBITDARM Coverage, 1.0x to 1.5x | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 0  
Mezzanine | EBITDARM Coverage Below 1.0x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 14,500,000  
Mezzanine | EBITDARM Coverage Below 1.0x | Prior to 2017    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 14,500,000  
Mezzanine | EBITDARM Coverage Not Available    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 750,000  
Mezzanine | EBITDARM Coverage Not Available | 2019    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 750,000  
Revolving Credit Facility    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 12,873,000  
Revolving Credit Facility | EBITDARM Coverage above 1.5x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross 0  
Revolving Credit Facility | EBITDARM Coverage, 1.0x to 1.5x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans and Leases Receivable, Gross $ 12,873,000