Fair Value Measurements - Schedule of Fair Value of Liabilities (Details) - USD ($)
Sep. 30, 2020
May 22, 2020
Dec. 31, 2019
Mar. 15, 2019
Nov. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term debt, net $ 1,092,241,000   $ 1,057,389,000    
Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term debt, net 737,241,000   882,389,000    
Senior Secured Note Due 2025 [Member] | Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of debt instrument 101,658,000   0    
Debt Instrument, Face Amount $ 127,073,000 $ 127,100,000 $ 0    
Interest rate, stated percentage 8.00% 8.00% 8.00%    
Senior Notes Due 2026 | Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of debt instrument $ 117,226,000   $ 394,480,000    
Debt Instrument, Face Amount $ 289,448,000   $ 400,000,000   $ 400,000,000.0
Interest rate, stated percentage 5.375%   5.375%   5.375%
Senior Notes Due 2027 | Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of debt instrument $ 144,322,000   $ 520,000,000    
Debt Instrument, Face Amount $ 356,351,000   $ 500,000,000 $ 500,000,000.0  
Interest rate, stated percentage 6.875%   6.875% 6.875%  
Carrying Value | Senior Secured Note Due 2025 [Member] | Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term debt, net $ 102,916,000   $ 0    
Carrying Value | Senior Notes Due 2026 | Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term debt, net 284,675,000   392,623,000    
Carrying Value | Senior Notes Due 2027 | Senior Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term debt, net 349,650,000   489,766,000    
Revolving Credit Facility | Line of Credit          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term Debt, Gross 355,000,000   175,000,000    
Fair value of debt instrument 355,000,000   175,000,000    
Debt Instrument, Face Amount 355,000,000   175,000,000    
Revolving Credit Facility | Carrying Value | Line of Credit          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Long-term Debt, Gross $ 355,000,000   $ 175,000,000