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Acquisitions (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 0 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2011 | Nov. 07, 2013 L.B. Foster Ball Winch, Inc. [Member] | Dec. 31, 2013 L.B. Foster Ball Winch, Inc. [Member]
Business Acquisition [Line Items] |  |  |  |
Business Acquisition, Effective Date of Acquisition |  |  | Nov. 07, 2013 |
Business Acquisition, Name of Acquired Entity |  |  | Ball Winch, LLC (Ball Winch) |
Payments to Acquire Businesses, Net of Cash Acquired | $ 37,500 | $ 8,952 | $ 37,500 |
Business Combination, Indemnification Assets, Amount as of Acquisition Date |  |  | 3,300 |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  | 37,995 |
Payments for Previous Acquisition |  |  |  | 495
Business Acquisition, Transaction Costs |  |  |  | $ 182

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