Discontinued Operations (Summary Of Components Of Loss From Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of rental equipment		$ 19,200
Net income (loss) from discontinued operations	$ 1,063	(13,999)
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	293	35,909
Impairment of rental equipment		19,167
Storage, handling and other expenses	(142)	1,319
Gain on sale of rental equipment	(33)
Logistics transportation costs		26,815
Loss on sale of rental equipment		33
Administrative expenses	(149)	4,931
Total operating expenses	(324)	52,265
Operating loss	617	(16,356)
Interest expense (income)		2,102
Income (loss) before income taxes	617	(18,458)
Income tax benefit	(446)	(4,459)
Net income (loss) from discontinued operations	1,063	(13,999)
Rail Lease [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	293	5,803
Impairment of rental equipment		19,167
Storage, handling and other expenses	(142)	1,319
Gain on sale of rental equipment	(33)
Loss on sale of rental equipment		33
Administrative expenses	91	769
Total operating expenses	(84)	21,288
Operating loss	377	(15,485)
Interest expense (income)		2,105
Income (loss) before income taxes	377	(17,590)
Income tax benefit	(496)	(4,255)
Net income (loss) from discontinued operations	873	(13,335)
Logistics [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		30,106
Logistics transportation costs		26,815
Administrative expenses	(240)	4,162
Total operating expenses	(240)	30,977
Operating loss	240	(871)
Interest expense (income)		(3)
Income (loss) before income taxes	240	(868)
Income tax benefit	50	(204)
Net income (loss) from discontinued operations	$ 190	$ (664)