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Debt - Long-term Debt, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Long-term debt $ 1,318,957 $ 1,193,957
Debt issuance costs, net (12,845) (14,691)
Long-term debt, net 1,306,112 1,179,266
Senior Notes | January 2025 Notes    
Debt Instrument [Line Items]    
Long-term debt 577,913 577,913
Debt issuance costs, net (7,402) (8,676)
Long-term debt, net 570,511 569,237
Senior Notes | January 2028 Notes    
Debt Instrument [Line Items]    
Long-term debt 361,044 361,044
Debt issuance costs, net (5,443) (6,015)
Long-term debt, net 355,601 355,029
Secured Debt | Senior Secured Credit Facility    
Debt Instrument [Line Items]    
Long-term debt 380,000 255,000
Debt issuance costs, net 0 0
Long-term debt, net 380,000 255,000
Secured Debt | Senior Secured Credit Facility | Other Noncurrent Assets    
Debt Instrument [Line Items]    
Debt issuance costs related to line of credit arrangements $ 3,200 $ 2,300