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Supplemental Cash Flow Information (Net Changes in Components of Operating Assets and Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
(Increase) decrease in:
Accounts receivable	$ 101,405	$ 18,170
Inventories	(5,024)	(6,616)
Deferred charges	2,783	(4,092)
Other current assets	(3,746)	(5,067)
Increase (decrease) in:
Accounts payable	(62,365)	5,226
Accrued liabilities	(25,519)	(4,421)
Net changes in components of operating assets and liabilities	$ 7,534	$ 3,200

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 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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