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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract] |
Schedule of Net Changes In Components Of Operating Assets And Liabilities | The following table provides information regarding the net changes in components of operating assets and liabilities:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
(Increase) decrease in: |  |  |  |  |
Accounts receivable | $ | 88,116 |  |  | $ | (80,126) |  |  | $ | 130,573 |
Inventories | (34,740) |  |  | 7,659 |  |  | 20,963 |
Deferred charges | 24,590 |  |  | 4,093 |  |  | (5,826) |
Other current assets | 1,188 |  |  | (4,874) |  |  | 9,337 |
Increase (decrease) in: |  |  |  |  |
Accounts payable | (9,742) |  |  | 81,915 |  |  | (130,991) |
Accrued liabilities | (30,785) |  |  | (79,765) |  |  | (26,208) |
Net changes in components of operating assets and liabilities | $ | 38,627 |  |  | $ | (71,098) |  |  | $ | (2,152) |

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