Mortgage And Other Notes Receivable (Schedule of Financing Receivables Allowance for Credit Loss) (Details)	Mar. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	$ 192,837
EBITDARM Coverage Above 2.0x [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	74,989
EBITDARM Coverage 1.5x to 2.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	1,307
EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	37,426
EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	79,115
Mortgages [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	141,600
Mortgages [Member] | Prior to 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	7,083
Mortgages [Member] | 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	10,000
Mortgages [Member] | 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	9,953
Mortgages [Member] | 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	69,213
Mortgages [Member] | 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	41,351
Mortgages [Member] | 2020 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	4,000
Mortgages [Member] | EBITDARM Coverage Above 2.0x [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	74,989
Mortgages [Member] | EBITDARM Coverage Above 2.0x [Member] | Prior to 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	7,083
Mortgages [Member] | EBITDARM Coverage Above 2.0x [Member] | 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	67,906
Mortgages [Member] | EBITDARM Coverage 1.5x to 2.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	1,307
Mortgages [Member] | EBITDARM Coverage 1.5x to 2.0x | 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	1,307
Mortgages [Member] | EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	12,259
Mortgages [Member] | EBITDARM Coverage, 1.0x to 1.5x | 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	10,000
Mortgages [Member] | EBITDARM Coverage, 1.0x to 1.5x | 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	2,259
Mortgages [Member] | EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	53,045
Mortgages [Member] | EBITDARM Coverage Below 1.0x | 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	9,953
Mortgages [Member] | EBITDARM Coverage Below 1.0x | 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	39,092
Mortgages [Member] | EBITDARM Coverage Below 1.0x | 2020 [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	4,000
Mezzanine
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	40,536
Mezzanine | 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	40,536
Mezzanine | EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	14,466
Mezzanine | EBITDARM Coverage, 1.0x to 1.5x | 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	14,466
Mezzanine | EBITDARM Coverage Below 1.0x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	26,070
Mezzanine | EBITDARM Coverage Below 1.0x | 2016
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	26,070
Revolving Credit Facility
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	10,701
Revolving Credit Facility | EBITDARM Coverage, 1.0x to 1.5x
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Gross	$ 10,701