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Supplementary Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract] |
Schedule of Cash Flow, Supplemental Disclosures | Total cash, cash equivalents and restricted cash are as follows:
| June 30, 2019 |  | December 31, 2018 |  | June 30, 2018 |  | December 31, 2017
| $ |  | $ |  | $ |  | $
Cash and cash equivalents | 235,199 |  |  | 424,169 |  |  | 454,933 |  |  | 445,452 |
Restricted cash – current | 50,798 |  |  | 40,493 |  |  | 55,466 |  |  | 38,179 |
Restricted cash – non-current | 36,886 |  |  | 40,977 |  |  | 34,627 |  |  | 68,543 |
| 322,883 |  |  | 505,639 |  |  | 545,026 |  |  | 552,174 |

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