Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2021

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,
	2021		2020
(Increase) decrease in:
Accounts receivable	$	15,487	$	165,505
Inventories	11,108		(24,674)
Deferred charges	20,362		17,616
Other current assets	(10,335)		(1,620)
Increase (decrease) in:
Accounts payable	(50,361)		(59,477)
Accrued liabilities	20,196		(25,204)
Net changes in components of operating assets and liabilities	$	6,457	$	72,146