Annual report pursuant to Section 13 and 15(d)

Credit Losses, Financial Assets and Other Instruments (Credit Risk Classification) (Details)

v3.20.4
Credit Losses, Financial Assets and Other Instruments (Credit Risk Classification) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Investing Receivables    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier $ 64,354  
2016 0  
2017 971  
2018 0  
2019 6,041  
2020 239  
Total 71,605 $ 73,523
Investing Receivables | Investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier 64,354  
2016 0  
2017 971  
2018 0  
2019 0  
2020 239  
Total 65,564  
Investing Receivables | Non-investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier 0  
2016 0  
2017 0  
2018 0  
2019 6,041  
2020 0  
Total 6,041  
Tenant Notes Receivables    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier 97  
2016 179  
2017 0  
2018 1,192  
2019 1,967  
2020 2,146  
Total 5,581  
Tenant Notes Receivables | Investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier 0  
2016 14  
2017 0  
2018 1,028  
2019 84  
2020 343  
Total 1,469  
Tenant Notes Receivables | Non-investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier 97  
2016 165  
2017 0  
2018 164  
2019 1,883  
2020 1,803  
Total 4,112  
Sales-Type Lease Receivables | Investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
2015 and Earlier 0  
2016 0  
2017 0  
2018 0  
2019 0  
2020 6,573  
Total $ 6,573