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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract] |
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.
| Nine Months Ended September 30,
| 2021 |  | 2020
(Increase) decrease in: |  |  |
Accounts receivable | $ | 15,487 |  |  | $ | 165,505 |
Inventories | 11,108 |  |  | (24,674) |
Deferred charges | 20,362 |  |  | 17,616 |
Other current assets | (10,335) |  |  | (1,620) |
Increase (decrease) in: |  |  |
Accounts payable | (50,361) |  |  | (59,477) |
Accrued liabilities | 20,196 |  |  | (25,204) |
Net changes in components of operating assets and liabilities | $ | 6,457 |  |  | $ | 72,146 |

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