Assets Held for Sale and Discontinued Operations (Results of Operations Associated with Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations	$ (943)	$ (102)	$ (1,494)	$ 106
Discontinued Operation | U.K. and U.S. Refining And Marketing Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	0	246	10	658
Other costs and expenses (benefits)	943	348	1,504	552
(Loss) income before taxes	(943)	(102)	(1,494)	106
Income tax expense	0	0	0	0
(Loss) income from discontinued operations	$ (943)	$ (102)	$ (1,494)	$ 106