Income Taxes (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Deferred tax liabilities:
Property, plant and equipment and Rail assets leased to others		$ (66,913)	$ (203,432)
Deferred Tax Liabilities, Intangible Assets		(7,022)	(9,677)
Investments		(35,842)	(50,244)
Other		(3,859)	(3,427)
Deferred tax liabilities		(113,636)	(266,780)
Deferred tax assets:
Employee benefits		27,695	20,910
Accounts and notes receivable		2,189	4,207
Inventory		4,533	1,905
Federal income tax credits		2,292	25,163
Net operating loss carryforwards		2,906	25,427
Derivative instruments		1,774	5,949
Lease liability		64	9,068
Other		5,426	5,456
Total deferred tax assets		46,879	98,085
less: Valuation allowance		(2,834)	(1,452)
Net deferred tax assets		44,045	96,633
Net deferred tax liabilities(a)	[1]	(69,591)	$ (170,147)
Other Assets [Member]
Deferred tax assets:
Deferred Income Tax Assets, Net		$ 1,500

[1] The Company had deferred tax assets of $1.5 million included in Other assets in the Consolidated Balance Sheets as of December 31, 2021.