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Long-Term Debt - Schedule of Debt Maturities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total $ 2,954,244 $ 2,145,883
2017 Credit Agreement    
Debt Instrument [Line Items]    
2021 0  
2022 0  
2023 0  
2024 264,250  
2025 0  
2026 and beyond 0  
Total $ 264,250