CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 2,025,204	$ 1,022,422	$ 1,811,247
Costs and expenses:
General and administrative	13,701	10,284	10,198
Depreciation and amortization	19,797	18,573	16,641
Total costs and expenses	2,009,045	1,028,169	1,803,447
Operating earnings (losses)	16,159	(5,747)	7,800
Other income (expense):
Gain on dissolution of investment	0	0	573
Interest income	243	656	2,766
Interest expense	(746)	(444)	(636)
Total other income (expense), net	(503)	212	2,703
Earnings (Losses) before income taxes	15,656	(5,535)	10,503
Income tax (provision) benefit:
Current	(5,169)	12,919	(211)
Deferred	1,401	(6,389)	(2,085)
Income tax (provision) benefit	(3,768)	6,530	(2,296)
Net earnings	$ 11,888	$ 995	$ 8,207
Earnings per share:
Basic net earnings per common share (in dollars per share)	$ 2.78	$ 0.23	$ 1.94
Diluted net earnings per common share (in dollars per share)	2.75	0.23	1.94
Dividends per common share (in dollars per share)	$ 0.96	$ 0.96	$ 0.94
Marketing
Revenues:
Total revenues	$ 1,930,042	$ 950,426	$ 1,748,056
Costs and expenses:
Cost and expenses	1,898,126	940,031	1,723,216
Transportation
Revenues:
Total revenues	94,498	71,724	63,191
Costs and expenses:
Cost and expenses	75,295	58,888	53,392
Pipeline and storage
Revenues:
Total revenues	664	272	0
Costs and expenses:
Cost and expenses	$ 2,126	$ 393	$ 0