CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Total revenues	$ 1,022,422	$ 1,811,247	$ 1,750,213
Costs and expenses:
General and administrative	10,284	10,198	8,937
Depreciation and amortization	18,573	16,641	10,654
Total costs and expenses	1,028,169	1,803,447	1,748,805
Operating (losses) earnings	(5,747)	7,800	1,408
Other income (expense):
Gain on dissolution of investment	0	573	0
Interest income	656	2,766	2,155
Interest expense	(444)	(636)	(109)
Total other income (expense), net	212	2,703	2,046
(Losses) earnings before income taxes	(5,535)	10,503	3,454
Income tax (provision) benefit:
Current	12,919	(211)	427
Deferred	(6,389)	(2,085)	(936)
Income tax benefit (provision)	6,530	(2,296)	(509)
Net earnings	$ 995	$ 8,207	$ 2,945
Earnings per share:
Basic net earnings per share (in dollars per share)	$ 0.23	$ 1.94	$ 0.70
Diluted net earnings per common share (in dollars per share)	0.23	1.94	0.70
Dividends per common share (in dollars per share)	$ 0.96	$ 0.94	$ 0.88
Marketing
Revenues:
Total revenues	$ 950,426	$ 1,748,056	$ 1,694,437
Costs and expenses:
Cost and expenses	940,031	1,723,216	1,681,045
Transportation
Revenues:
Total revenues	71,724	63,191	55,776
Costs and expenses:
Cost and expenses	58,888	53,392	48,169
Pipeline and storage
Revenues:
Total revenues	272	0	0
Costs and expenses:
Cost and expenses	$ 393	$ 0	$ 0