Fair Value Measurements - Schedule of Fair Value of Liabilities (Details) - USD ($)
Mar. 31, 2021
Mar. 26, 2021
Mar. 19, 2021
Dec. 31, 2020
May 22, 2020
Mar. 15, 2019
Nov. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Long-term debt, net $ 1,063,754,000     $ 1,068,624,000      
Senior Notes              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Long-term debt, net 903,754,000     738,624,000      
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 126,438,000     114,366,000      
Debt Instrument, Face Amount $ 127,073,000     $ 127,073,000 $ 127,100,000    
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 $ 254,714,000     $ 206,955,000      
Debt Instrument, Face Amount $ 289,448,000     $ 289,448,000     $ 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 $ 317,152,000     $ 254,791,000      
Debt Instrument, Face Amount $ 356,351,000     $ 356,351,000   $ 500,000,000.0  
Interest rate, stated percentage 6.875%     6.875%   6.875%  
Convertible Senior Notes Due 2028 | Convertible Notes Payable              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Fair value of debt instrument $ 161,772,000     $ 0      
Debt Instrument, Face Amount $ 170,000,000 $ 20,000,000.0 $ 150,000,000.0 $ 0      
Interest rate, stated percentage 3.25%   3.25% 3.25%      
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 $ 104,916,000     $ 103,901,000      
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 285,063,000     284,867,000      
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 350,064,000     349,856,000      
Carrying Value | Convertible Senior Notes Due 2028 | Convertible Notes Payable              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Long-term debt, net 163,711,000     0      
Revolving Credit Facility | Line of Credit              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Long-term Debt, Gross 160,000,000     330,000,000      
Fair value of debt instrument 160,000,000     330,000,000      
Debt Instrument, Face Amount 160,000,000     330,000,000      
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 $ 160,000,000     $ 330,000,000