Assets Held for Sale and Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2021

Discontinued Operations and Disposal Groups [Abstract]

Results of Operations Associated with Discontinued Operations

The results of operations associated with discontinued operations for the three-month and six-month periods ended June 30, 2021 and 2020 were as follows:

	Three Months Ended June 30,			Six Months Ended June 30,
(Thousands of dollars)	2021		2020	2021		2020
Revenues	$	246	1	$	658	4,074
Costs and expenses
Other costs and expenses (benefits)	348		1,268	552		10,203
(Loss) income before taxes	(102)		(1,267)	106		(6,129)
Income tax expense	—		—	—		—
(Loss) income from discontinued operations	$	(102)	(1,267)	$	106	(6,129)

Major Categories of Assets and Liabilities Reflected as Held for Sale

(Thousands of dollars)	June 30, 2021		December 31, 2020
Current assets
Cash	$	—	10,185
Inventories	—		406
Property, plant, and equipment, net	40,820		307,704
Deferred income taxes and other assets	—		9,441
Total current assets associated with assets held for sale	$	40,820	327,736
Current liabilities
Accounts payable	$	—	5,306
Other accrued liabilities	—		45
Current maturities of long-term debt (finance lease)	—		737
Taxes payable	—		1,510
Long-term debt (finance lease)	—		6,513
Asset retirement obligation	—		261
Total current liabilities associated with assets held for sale	$	—	14,372