XML 47 R34.htm IDEA: XBRL DOCUMENT
v3.8.0.1

State and Local Incentives (Policy) | 12 Months Ended
--- | ---
Dec. 31, 2017
State and Local Incentives [Abstract] |
State and Local Incentives | State and Local Incentives ﻿ The Company records state and local incentives when there is reasonable assurance that the incentive will be received and the Company is able to comply with the conditions attached to the incentives received. State and local incentives related to assets are recorded as deferred income and recognized on a straight-line basis over the useful life of the related long-lived assets of seven to sixteen years.

X
- Definition State and Local Incentives [Abstract] + References No definition available. + Details
Name: | rail_StateAndLocalIncentivesAbstract
Namespace Prefix: | rail_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for state and local incentives. + References No definition available. + Details
Name: | rail_StateAndLocalIncentivesPolicyTextBlock
Namespace Prefix: | rail_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration