Discontinued Operations (Summary Of Components Of Income (Loss) From Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net (loss) income from discontinued operations	$ (20,010)	$ (509)	$ 9,495
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rail lease revenue	26,130	35,703	32,476
Depreciation of rental equipment	5,248	14,189	11,199
Storage, handling and other expenses	6,782	5,692	5,615
Gain on sale of rental equipment	(9,490)	(1,839)	(14)
Administrative expenses	3,680	4,065	3,111
Total operating expenses	6,220	22,107	19,911
Operating income	19,910	13,596	12,565
Interest expense	13,343	15,772	11,237
Income (loss) before income taxes	6,567	(2,176)	1,328
Loss on classification as held for sale and subsequent impairment	32,955
(Loss) income from discontinued operations before income taxes	(26,388)	(2,176)	1,328
Income tax benefit	(6,378)	(1,667)	(8,167)
Net (loss) income from discontinued operations	$ (20,010)	$ (509)	$ 9,495