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Supplemental Cash Flow Information (Net Changes in Components of Operating Assets and Liabilities) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
(Increase) decrease in:
Accounts receivable	$ 178,509	$ 34,843
Inventories	(44,394)	(11,298)
Deferred charges	9,240	463
Other current assets	(9,919)	(14,804)
Decrease in:
Accounts payable	(93,080)	(5,705)
Accrued liabilities	(20,838)	(41,406)
Net changes in components of operating assets and liabilities	$ 19,518	$ (37,907)

X

- Definition

The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

+ References

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-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
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The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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Amount of increase (decrease) in current assets classified as other.

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