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Supplemental Cash Flow Information (Tables) | 3 Months Ended
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Mar. 31, 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.
| Three Months Ended March 31,
| 2017 |  | 2016
(Increase) decrease in: |  |  |
Accounts receivable | $ | 9,169 |  |  | $ | 10,810 |
Inventories | 6,009 |  |  | (19,815 | )
Deferred charges | (348 | ) |  | (3,479 | )
Other current assets | (4,605 | ) |  | (5,090 | )
Decrease in: |  |  |
Accounts payable | (17,305 | ) |  | (19,850 | )
Accrued liabilities | (21,988 | ) |  | (14,643 | )
Net changes in components of operating assets and liabilities | (29,068 | ) |  | (52,067 | )

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