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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2017
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,
| 2017 |  | 2016
(Increase) decrease in: |  |  |
Accounts receivable | $ | (79,938 | ) |  | $ | 11,029 |
Inventories | 31,973 |  |  | (26,215 | )
Deferred charges | (293 | ) |  | (5,291 | )
Other current assets | (2,769 | ) |  | 5,184 |
Increase (decrease) in: |  |  |
Accounts payable | 32,896 |  |  | (27,213 | )
Accrued liabilities | (8,131 | ) |  | (20,901 | )
Net changes in components of operating assets and liabilities | (26,262 | ) |  | (63,407 | )

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