Credit Losses, Financial Assets and Other Instruments (Credit Risk Classification) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investing Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	$ 73,478
2018	0
2019	5,033
2020	1,757
2021	6,262
Total	86,530	$ 83,825
Investing Receivables | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	73,478
2018	0
2019	0
2020	1,757
2021	6,262
Total	81,497
Investing Receivables | Non-investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	0
2018	0
2019	5,033
2020	0
2021	0
Total	5,033
Tenant Notes Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	180
2018	970
2019	160
2020	1,880
2021	0
Total	3,190
Tenant Notes Receivables | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	0
2018	855
2019	52
2020	234
2021	0
Total	1,141
Tenant Notes Receivables | Non-investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	180
2018	115
2019	108
2020	1,646
2021	0
Total	2,049
Sales-Type Lease Receivables | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2017 and Earlier	0
2018	0
2019	0
2020	5,934
2021	0
Total	$ 5,934