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v3.24.1.u1

Product Warranties (Additional Information) (Details) | 3 Months Ended
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Mar. 31, 2024
Maximum |
Product Warranties |
Warranty period | 5 years

X
- Definition Length of warranty period for new products produced. + References No definition available. + Details
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Namespace Prefix: | rail_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ProductInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |