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Senior Secured Notes (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 01, 2021 | Jun. 17, 2020 | Aug. 12, 2016 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Senior Notes [Line Items] |  |  |  |  |  |
Secured Long-term Debt, Noncurrent |  |  |  |  | $ 460,656 |
10.0% Senior Secured Notes due 2025 [Member] |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  | 10.00% |  | 10.00% | 10.00% |
Senior Notes, Principal amount |  | $ 446,700 |  | $ 446,675 | $ 446,675 |
Senior Notes, unamortized debt discount |  |  |  | 30,236 | 37,943 |
Unamortized Debt Issuance Expense |  |  |  | 8,727 | 11,558 |
Secured Long-term Debt, Noncurrent |  |  |  | $ 407,712 | $ 397,174 |
Senior Notes Debt Issuance Costs |  | 13,100 |  |  |  |
Senior Notes, Initial Fair Value |  | 405,000 |  |  |  |
1.50% Senior Secured Convertible Notes Due 2021 [Member] |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  |  | 1.50% | 1.50% |
Senior Notes, Principal amount |  |  |  | $ 0 | $ 65,485 |
Senior Notes, unamortized debt discount |  |  |  |  | 1,828 |
Unamortized Debt Issuance Expense |  |  |  |  | 175 |
Secured Long-term Debt, Noncurrent |  |  |  |  | 63,482 |
Senior Convertible Notes, interest expense |  |  |  | $ 2,300 | 7,700 |
Repayments of Convertible Debt | $ 65,500 |  |  |  |  |
Senior Secured Notes |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |
Senior Notes, Principal amount |  |  |  |  | 512,160 |
Senior Notes, unamortized debt discount |  |  |  |  | 39,771 |
Unamortized Debt Issuance Expense |  |  |  |  | $ 11,733 |
1.50% Senior Unsecured Convertible Notes Due 2021 [Member] |  |  |  |  |  |
Senior Notes [Line Items] |  |  |  |  |  |
Senior Notes, interest rate, stated percentage |  |  | 1.50% |  |  |
Senior Notes, Principal amount |  |  | $ 172,500 |  |  |
Net proceeds from Convertible Notes Issuance |  |  | 166,600 |  |  |
Senior Notes Debt Issuance Costs |  |  | 5,900 |  |  |
Senior Unsecured Convertible Notes, Initial fair value of liability component |  |  | $ 132,300 |  |  |
Senior Unsecured Convertible Notes, Effective interest rate |  |  | 7.25% |  |  |
Senior Unsecured Convertible Notes, Initial value of equity component |  |  | $ 40,200 |  |  |
Capped call, Transaction costs |  |  | $ 24,200 |  |  |
Senior Convertible Notes, interest expense |  |  |  |  |  | $ 11,000
Senior Unsecured Notes, repurchased, retired or redeemed face amount |  | 107,000 |  |  |  |
Repayments of Convertible Debt |  | $ 53,500 |  |  |  |

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