Other Financial Information (Tables)

3 Months Ended

Mar. 31, 2022

Additional disclosures regarding cash flow activities are provided below.


	Three Months Ended March 31,
(Thousands of dollars)	2022		2021
Net decrease (increase) in operating working capital, excluding cash and cash equivalents:
(Increase) in accounts receivable ¹	$	(117,928)	(16,954)
(Increase) decrease in inventories	(4,541)		392
(Increase) in prepaid expenses	(515)		(3,652)
Increase in accounts payable and accrued liabilities ¹	40,426		11,810
Increase (decrease) in income taxes payable	1,636		(648)
Net (increase) in noncash operating working capital	$	(80,922)	(9,052)
Supplementary disclosures:
Cash income taxes paid, net of refunds	$	103	720
Interest paid, net of amounts capitalized of $5.3 million in 2022 and $3.3 million in 2021	40,181		44,577

Non-cash investing activities:
Asset retirement costs capitalized 2	$	3,889	6,390
(Increase) decrease in capital expenditure accrual	(49,352)		13,617

1 Excludes receivable/payable balances relating to mark-to-market of derivative instruments and contingent consideration relating to acquisitions.

2 Excludes non-cash capitalized cost offset by Terra Nova impairment of $74.4 million in the first quarter of 2021.