Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Goodwill by Segment
Goodwill	$ 278.2	$ 240.4
Goodwill impairment charges	0	0
Rail Group
Goodwill by Segment
Goodwill	134.6	122.5
Accumulated goodwill impairment losses	325.0	325.0
Construction Products Group
Goodwill by Segment
Goodwill	126.9	105.2
Energy Equipment Group
Goodwill by Segment
Goodwill	14.9	10.9
Railcar Leasing and Management Services Group
Goodwill by Segment
Goodwill	$ 1.8	$ 1.8

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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