Long-Term Debt (Tables)  | 
9 Months Ended | ||||||||||||||||||||||||||||||||||||
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Sep. 30, 2020  | |||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||
| Schedule of debt instrument interest rate | 
  
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| Schedule of deferred loans | 
  
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| Schedule of liability components of exchangeable notes | 
 The net carrying amounts of the liability components of our exchangeable notes consist of the following (in thousands): 
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| Schedule of interest expense related to exchangeable notes | 
 The following table presents the interest expense recognized related to the exchangeable notes (in thousands): 
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| Schedule of principal repayments on long-term debt including finance lease obligations | 
 The following are scheduled principal repayments on our long-term debt including finance lease obligations as of September 30, 2020 for each of the following periods (in thousands):  
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| X | ||||||||||
- Definition Tabular disclosure of debt instrument interest rate. No definition available. 
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| X | ||||||||||
- Definition Tabular disclosure for deferred loans with accrued interest at a floating rate per annum based on six-month LIBOR plus a margin. No definition available. 
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| X | ||||||||||
- Definition Tabular disclosure of recognition of interest expenses on debt instruments. No definition available. 
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| X | ||||||||||
- References No definition available. 
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| X | ||||||||||
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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