XML 83 R62.htm IDEA: XBRL DOCUMENT v3.20.4
Unsecured Debt - Future Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total Debt $ 643,550 $ 990,667
Unsecured Debt    
Debt Instrument [Line Items]    
2021 0  
2022 0  
2023 600,000  
2024 400,000  
2025 500,000  
Thereafter 3,400,000  
Total Debt $ 4,900,000