Segment Reporting - Information Concerning Business Activities (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	4		4
Number of operating segments | segment	4		4
Segment Reporting Information [Line Items]
Revenues	$ 852,901	$ 568,181	$ 2,619,196	$ 1,380,416
Segment operating earnings (losses)	2,993	2,301	14,101	12,487
Depreciation and amortization	6,008	4,849	16,109	14,703
Property and equipment additions	2,014	6,327	6,797	9,929
Crude oil marketing
Segment Reporting Information [Line Items]
Revenues	814,394	543,228	2,524,465	1,310,343
Depreciation and amortization	2,008	1,611	5,690	5,050
Property and equipment additions	343	443	4,351	1,145
Inventory liquidation (losses) gains	(5,100)	(300)	2,100	10,300
Trans-portation
Segment Reporting Information [Line Items]
Revenues	29,830	24,826	86,054	69,558
Depreciation and amortization	2,791	2,957	8,671	8,895
Property and equipment additions	722	4,904	1,416	7,607
Pipeline and storage
Segment Reporting Information [Line Items]
Revenues	0	127	0	515
Depreciation and amortization	269	281	808	758
Property and equipment additions	817	980	890	1,169
Logistics and repurposing
Segment Reporting Information [Line Items]
Revenues	8,677	0	8,677	0
Depreciation and amortization	940	0	940	0
Property and equipment additions	132	0	132	0
Operating segments
Segment Reporting Information [Line Items]
Revenues	855,966	568,833	2,625,333	1,381,821
Segment operating earnings (losses)	7,623	5,803	26,961	22,326
Operating segments | Crude oil marketing
Segment Reporting Information [Line Items]
Revenues	814,394	543,228	2,524,465	1,310,343
Segment operating earnings (losses)	5,070	4,255	20,301	19,643
Operating segments | Trans-portation
Segment Reporting Information [Line Items]
Revenues	29,983	24,867	86,322	69,670
Segment operating earnings (losses)	3,307	2,264	9,112	4,520
Operating segments | Pipeline and storage
Segment Reporting Information [Line Items]
Revenues	2,912	738	5,869	1,808
Segment operating earnings (losses)	(909)	(716)	(2,607)	(1,837)
Operating segments | Logistics and repurposing
Segment Reporting Information [Line Items]
Revenues	8,677	0	8,677	0
Segment operating earnings (losses)	155	0	155	0
Intersegment
Segment Reporting Information [Line Items]
Revenues	(3,065)	(652)	(6,137)	(1,405)
Intersegment | Crude oil marketing
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Intersegment | Trans-portation
Segment Reporting Information [Line Items]
Revenues	(153)	(41)	(268)	(112)
Intersegment | Pipeline and storage
Segment Reporting Information [Line Items]
Revenues	(2,912)	(611)	(5,869)	(1,293)
Intersegment | Logistics and repurposing
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Other
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Segment operating earnings (losses)	0	0	0	0
Depreciation and amortization	0	0	0	0
Property and equipment additions	$ 0	$ 0	$ 8	$ 8