Assets Held for Sale and Discontinued Operations (Results of Operations Associated with Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	$ (422)	$ (706)	$ (1,916)	$ (600)
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	144	10	801
Other costs and expenses	422	850	1,926	1,401
Loss before taxes	(422)	(706)	(1,916)	(600)
Income tax expense	0	0	0	0
Loss from discontinued operations	$ (422)	$ (706)	$ (1,916)	$ (600)