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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($)
$ in Thousands
9 Months Ended
Mar. 15, 2019
Nov. 30, 2017
Sep. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]        
Document Period End Date     Sep. 30, 2019  
Total long-term debt, net     $ 1,001,867 $ 691,630
Senior Notes        
Debt Instrument [Line Items]        
Unamortized debt discount     (3,643) 0
Unamortized debt issuance costs on Senior Notes     (14,490) (8,370)
Total long-term debt, net     881,867 391,630
Senior Notes | Senior Notes Due 2026        
Debt Instrument [Line Items]        
Percentage of principal amount, change in control   101.00%    
Gross amount of long-term debt     $ 400,000 400,000
Interest rate, stated percentage   5.375% 5.375%  
Senior Notes | Senior Notes Due 2027        
Debt Instrument [Line Items]        
Percentage of principal amount, change in control 101.00%      
Gross amount of long-term debt     $ 500,000 0
Unamortized debt discount $ (3,800)      
Interest rate, stated percentage 6.875%   6.875%  
Revolving Credit Facility | Line of Credit        
Debt Instrument [Line Items]        
Gross amount of long-term debt     $ 120,000 $ 300,000