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Debt - Maturity Schedule (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
2021 $ 0  
2022 0  
2023 0  
2024 0  
2025 145,000  
Thereafter 950,000  
Long-term Debt, Gross $ 1,095,000 $ 946,000