Commitments and Contingencies (Components Of Lease Revenue) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Commitments and Contingencies [Abstract]
Operating lease revenue		$ 17,177	$ 17,436	$ 34,131	$ 34,770
Variable lease revenue	[1]	40	(266)	27	(198)
Sublease revenue		59	204	136	428
Total lease revenue		$ 17,276	$ 17,374	$ 34,294	$ 35,000

[1] Represents amounts delivered by Green Plains Trade and other customers in excess of various minimum volume commitments, as well as the difference between the contracted railcar volumetric capacity and the actual amount provided to Green Plains Trade during the period.