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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 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.
| Six Months Ended June 30,
| 2017 |  | 2016
(Increase) decrease in: |  |  |
Accounts receivable | $ | 3,666 |  |  | $ | (21,274 | )
Inventories | 29,800 |  |  | (34,512 | )
Deferred charges | (93 | ) |  | (6,272 | )
Other current assets | (2,115 | ) |  | (4,335 | )
Decrease in: |  |  |
Accounts payable | (6,843 | ) |  | (5,642 | )
Accrued liabilities | (16,102 | ) |  | (18,206 | )
Net changes in components of operating assets and liabilities | 8,313 |  |  | (90,241 | )

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