Discontinued Operations (Summary Of Components Of Income (Loss) From Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Discontinued Operations [Abstract]
Rail lease revenue	$ 5,871	$ 8,759	$ 20,214	$ 26,982
Depreciation of rental equipment		3,537	5,248	10,505
Storage, handling and other expenses	3,453	1,008	5,813	4,424
(Gain) loss on sale of rental equipment	(757)	8	(9,418)	(9)
Administrative expenses	620	974	2,977	2,825
Total operating expenses	3,316	5,527	4,620	17,745
Operating income	2,555	3,232	15,594	9,237
Interest expense	2,975	3,972	10,104	11,364
(Loss) income before income taxes	(420)	(740)	5,490	(2,127)
Loss on classification as held for sale and subsequent impairment	25,632		32,955
Loss from discontinued operations before income taxes	(26,052)	(740)	(27,465)	(2,127)
Income tax benefit	(6,140)	(175)	(6,482)	(502)
Net loss from discontinued operations	$ (19,912)	$ (565)	$ (20,983)	$ (1,625)