Benefit Plans - Unfunded Status (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 41,367	$ 56,411	$ 60,479
Fair value of plan assets	40,639	49,821	$ 46,161
WY Refining
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	24,730	34,333
Fair value of plan assets	21,940	28,076
Underfunded/(overfunded) status	2,790	6,257
Non-current assets	0	0
Non-current liabilities	(2,790)	(6,257)
Net amount recorded	(2,790)	(6,257)
Net actuarial gain (loss)	5,243	2,188
Total accumulated other comprehensive income (loss)	5,243	2,188
U.S. Oil
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	16,637	22,078
Fair value of plan assets	18,699	21,745
Underfunded/(overfunded) status	(2,062)	333
Non-current assets	2,062	0
Non-current liabilities	0	(333)
Net amount recorded	2,062	(333)
Net actuarial gain (loss)	(318)	(2,892)
Total accumulated other comprehensive income (loss)	$ (318)	$ (2,892)