Discontinued Operations (Summary Of Components Of Loss From Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 89,253	$ 143,817	$ 147,174
Depreciation of rental equipment	6,319	5,248	14,189
Impairment of rental equipment	19,724	32,955
Storage, handling and other expenses	5,732	6,782	5,692
(Gain) Loss on sale of rental equipment	19,608	(9,490)	(1,839)
Logistics transportation costs	58,440	104,109	97,170
Administrative expenses	17,380	22,191	21,513
Loss on classification as held for sale	18,477
Total operating expenses	145,680	161,795	136,725
Operating loss	(56,427)	(17,978)	10,449
Interest expense			15,772
Interest expense (income)	7,070	13,327
Loss before income taxes	(63,497)	(31,305)	(5,323)
Income tax benefit	(10,788)	(6,969)	(2,202)
Net loss from discontinued operations	(52,709)	(24,336)	(3,121)
Railcar Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	22,949	26,130	35,703
Depreciation of rental equipment	6,319	5,248	14,189
Impairment of rental equipment	19,724	32,955
Storage, handling and other expenses	5,732	6,782	5,692
(Gain) Loss on sale of rental equipment	19,608	(9,490)	(1,839)
Administrative expenses	5,678	3,680	4,065
Total operating expenses	57,061	39,175	22,107
Operating loss	(34,112)	(13,045)	13,596
Interest expense			15,772
Interest expense (income)	7,077	13,343
Loss before income taxes	(41,189)	(26,388)	(2,176)
Income tax benefit	(7,562)	(6,378)	(1,667)
Net loss from discontinued operations	(33,627)	(20,010)	(509)
Logistics [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	66,304	117,687	111,471
Logistics transportation costs	58,440	104,109	97,170
Administrative expenses	11,702	18,511	17,448
Loss on classification as held for sale	18,477
Total operating expenses	88,619	122,620	114,618
Operating loss	(22,315)	(4,933)	(3,147)
Interest expense (income)	(7)	(16)
Loss before income taxes	(22,308)	(4,917)	(3,147)
Income tax benefit	(3,226)	(591)	(535)
Net loss from discontinued operations	$ (19,082)	$ (4,326)	$ (2,612)