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Debt - Contractual Maturities of Senior Secured Credit Facility (Details) - Senior Secured Credit Facility - Term Loan - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
2020 $ 12,800  
2021 12,800  
2022 12,800  
2023 12,800  
2024 12,800  
Thereafter 1,183,600  
Total $ 1,247,600 $ 1,270,400