Financial Instruments and Risk Management (Tables)

12 Months Ended

Dec. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Recognized Gains and Losses for Derivative Instruments Not Designated as Hedging Instruments

The gains and losses recognized in the Consolidated Statements of Operations for derivative instruments not designated as hedging instruments for each of the three years presented are shown in the following table.

		Gain (Loss)
(Thousands of dollars)		Year Ended December 31,
Type of Derivative Contract	Statement of Operations Locations	2023		2022		2021
Commodity swaps	(Loss) on derivative instruments	$	–	$	(160,690)	$	(510,596)
Commodity collars	(Loss) on derivative instruments	–		(159,721)		(15,254)