Commitments And Contingencies (Narrative) (Details) $ in Millions	Sep. 30, 2017 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future minimum lease payments under operating lease agreements	$ 4.3
Containers [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Commitments to purchase rental equipment	63.9
Commitments to purchase rental equipment, year one	63.9
Railcars [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Commitments to purchase rental equipment	150.2
Commitments to purchase rental equipment, year one	113.5
Commitments to purchase rental equipment, year two	$ 36.7

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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