Mortgage And Other Notes Receivable (Schedule of Financing Receivables, Allowance for Credit Loss Roll Forward) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2021 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Beginning Balance	$ 4,946
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	225
Financing Receivable, Allowance for Credit Loss, Ending Balance	5,171
Loans and Leases Receivable, Gross	289,348
Mortgages [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	225,739
Mortgages [Member] \| EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	53,097
Mortgages [Member] \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	56,475
Mortgages [Member] \| EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	116,167
Mezzanine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	51,898
Mezzanine \| EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	25,273
Mezzanine \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	3,565
Mezzanine \| EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	22,310
Mezzanine \| EBITDARM Coverage Not Available
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	750
2021 \| Mezzanine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	25,875
2021 \| Mezzanine \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	3,565
2021 \| Mezzanine \| EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	22,310
2020 [Member] \| Mortgages [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	18,249
2020 [Member] \| Mortgages [Member] \| EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	3,974
2020 [Member] \| Mortgages [Member] \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	14,275
2019 \| Mortgages [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	48,152
2019 \| Mortgages [Member] \| EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	39,123
2019 \| Mortgages [Member] \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	9,029
2019 \| Mezzanine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	750
2019 \| Mezzanine \| EBITDARM Coverage Not Available
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	750
2018 \| Mortgages [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	144,867
2018 \| Mortgages [Member] \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	28,700
2018 \| Mortgages [Member] \| EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	116,167
Prior to 2017 \| Mortgages [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	14,471
Prior to 2017 \| Mortgages [Member] \| EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	10,000
Prior to 2017 \| Mortgages [Member] \| EBITDARM Coverage above 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	4,471
Prior to 2017 \| Mezzanine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	25,273
Prior to 2017 \| Mezzanine \| EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	$ 25,273

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Amount of increase (decrease) in allowance for credit loss on financing receivable.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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