Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue and Other Income:	$ 2,506,635	$ 2,280,018	$ 1,261,034
Loss on Commodity Derivatives, net	0	(237,024)	(52,204)
Miscellaneous Other Income	53,261	24,354	38,394
Gain on Sale of Assets	8,981	34,589	11,723
Total Revenue and Other Income	2,568,877	2,101,937	1,258,947
Costs and Expenses:
Operating and Other Costs	1,120,065	949,222	745,292
Depreciation, Depletion and Amortization	241,317	226,878	224,583
Freight Expense	294,103	182,441	103,819
General and Administrative Costs	103,470	116,696	87,161
Loss (Gain) on Debt Extinguishment	2,725	5,623	(657)
Interest Expense	29,325	52,640	63,342
Total Costs and Expenses	1,791,005	1,533,500	1,223,540
Earnings Before Income Tax	777,872	568,437	35,407
Income Tax Expense	121,980	101,458	1,297
Net Income	$ 655,892	$ 466,979	$ 34,110
Earnings per Share:
Total Basic Earnings per Share (in dollars per share)	$ 19.91	$ 13.41	$ 0.99
Total Basic Earnings per Share (in dollars per share)	19.79	13.07	0.96
Dividends on common shares (in dollars per share)	$ 2.20	$ 2.05	$ 0
Coal Revenue
Revenue and Other Income:	$ 2,106,366	$ 2,018,662	$ 1,092,022
Terminal Revenue
Revenue and Other Income:	106,166	78,915	65,193
Freight Revenue
Revenue and Other Income:	$ 294,103	$ 182,441	$ 103,819