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Supplementary Cash Flow Information Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract] |
Schedule of Cash and Cash Equivalents | Total cash, cash equivalents, restricted cash, and cash and restricted cash held for sale are as follows:
| September 30, 2021 |  | December 31, 2020 |  | September 30, 2020 |  | December 31, 2019
| $ |  | $ |  | $ |  | $
Cash and cash equivalents | 235,973 |  | 348,785 |  | 376,563 |  | 353,241
Restricted cash – current | 11,323 |  | 11,144 |  | 15,916 |  | 56,777
Restricted cash – non-current | 40,328 |  | 45,961 |  | 50,068 |  | 44,849
Assets held for sale – cash | — |  | — |  | — |  | 1,121
Assets held for sale – restricted cash | — |  | — |  | — |  | 337,000
| 287,624,000 |  | 405,890,000 |  | 442,547,000 |  | 456,325,000

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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- References No definition available. + Details
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