Mortgage And Other Notes Receivable (Schedule of Financing Receivables By Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	$ 209,491
Credit loss reserve	(5,214)	$ (5,210)
Mortgage and other notes receivable, net	204,277	$ 299,952
Mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	124,240
Mortgages | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	4,965
Mortgages | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	37,270
Mortgages | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	39,122
Mortgages | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	28,700
Mortgages | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	14,183
Mortgages | more than 1.5x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	71,212
Mortgages | more than 1.5x | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	4,965
Mortgages | more than 1.5x | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | more than 1.5x | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	33,364
Mortgages | more than 1.5x | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | more than 1.5x | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	28,700
Mortgages | more than 1.5x | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	4,183
Mortgages | between 1.0x and 1.5x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	32,700
Mortgages | between 1.0x and 1.5x | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | between 1.0x and 1.5x | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | between 1.0x and 1.5x | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | between 1.0x and 1.5x | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	32,700
Mortgages | between 1.0x and 1.5x | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | between 1.0x and 1.5x | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | less than 1.0x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	20,328
Mortgages | less than 1.0x | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | less than 1.0x | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | less than 1.0x | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	3,906
Mortgages | less than 1.0x | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	6,422
Mortgages | less than 1.0x | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mortgages | less than 1.0x | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	10,000
Mezzanine
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	68,365
Mezzanine | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	43,604
Mezzanine | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	750
Mezzanine | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	24,011
Mezzanine | more than 1.5x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	32,700
Mezzanine | more than 1.5x | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | more than 1.5x | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	23,189
Mezzanine | more than 1.5x | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | more than 1.5x | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | more than 1.5x | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | more than 1.5x | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	9,511
Mezzanine | between 1.0x and 1.5x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	20,415
Mezzanine | between 1.0x and 1.5x | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | between 1.0x and 1.5x | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	20,415
Mezzanine | between 1.0x and 1.5x | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | between 1.0x and 1.5x | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | between 1.0x and 1.5x | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | between 1.0x and 1.5x | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | less than 1.0x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	14,500
Mezzanine | less than 1.0x | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | less than 1.0x | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | less than 1.0x | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | less than 1.0x | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | less than 1.0x | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | less than 1.0x | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	14,500
Mezzanine | No coverage available
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	750
Mezzanine | No coverage available | 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | No coverage available | 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | No coverage available | 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | No coverage available | 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	750
Mezzanine | No coverage available | 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Mezzanine | No coverage available | Prior
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	0
Revolver
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	16,886
Revolver | more than 1.5x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	3,223
Revolver | between 1.0x and 1.5x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	13,663
Revolver | less than 1.0x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable, gross	$ 0