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Debt - Summary of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial liabilities [line items]    
Total debt $ 479,732 $ 595,977
Less: Current portion 66,667 0
Long-term portion 413,065 595,977
Senior Secured Notes due 2024    
Disclosure of financial liabilities [line items]    
Total debt 287,568 0
Term loan    
Disclosure of financial liabilities [line items]    
Total debt 197,761 0
Redemption option derivative asset    
Disclosure of financial liabilities [line items]    
Total debt (5,597) 0
Senior notes due 2020    
Disclosure of financial liabilities [line items]    
Total debt 0 595,977
Unamortized discount and transaction costs    
Disclosure of financial liabilities [line items]    
Total debt 13,806 $ 4,023
Unamortized transaction costs    
Disclosure of financial liabilities [line items]    
Total debt $ 2,239