Other Non-Current Assets (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2020 |
Dec. 31, 2019 |
|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | ||
| Land lease and purchase options | $ 3,506 | $ 4,320 |
| Permitting costs | 13,092 | 12,838 |
| Right of use asset — operating leases (Note 14) | 12,687 | 15,832 |
| Other | 3,961 | 3,765 |
| Total other non-current assets | $ 33,246 | $ 36,755 |
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:OtherAssetsNoncurrent | us-gaap:OtherAssetsNoncurrent |
| Maximum terms (in years) | 50 years |
| X | ||||||||||
- Definition Lease and purchase options non-current. No definition available.
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| X | ||||||||||
- Definition Lessee Leasing Arrangements, Operating Leases, Maximum Term of Contract Including Renewals No definition available.
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| X | ||||||||||
- Definition Permitting Costs No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Indicates line item in statement of financial position that includes operating lease right-of-use asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer. No definition available.
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| X | ||||||||||
- Definition Amount of noncurrent assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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