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Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning Balance |  | $ 81,752 | $ 82,949 |  |  |
Goodwill, Gross |  |  |  |  | $ 160,411 | $ 162,089
Acquisitions |  |  | 79,502 |  |  |
Foreign currency translation impact |  | (1,524) | (362) |  |  |
Disposition |  | (154) |  |  |  |
Impairment charges | $ (128,938) | (61,142) | (80,337) | $ 0 |  |
Accumulated impairment losses |  |  |  |  | (141,479) | (80,337)
Goodwill, Total |  | 81,752 | 82,949 | 82,949 | 18,932 | 81,752
Rail Products and Services [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning Balance |  | 48,188 | 38,956 |  |  |
Goodwill, Gross |  |  |  |  | 46,510 | 48,188
Acquisitions |  |  | 9,594 |  |  |
Foreign currency translation impact |  | (1,524) | (362) |  |  |
Disposition |  | (154) |  |  |  |
Impairment charges |  | (32,725) | 0 |  |  |
Accumulated impairment losses |  |  |  |  | (32,725) | 0
Goodwill, Total |  | 48,188 | 38,956 | 38,956 | 13,785 | 48,188
Construction Products [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning Balance |  | 5,147 | 5,147 |  |  |
Goodwill, Gross |  |  |  |  | 5,147 | 5,147
Acquisitions |  |  | 0 |  |  |
Foreign currency translation impact |  | 0 | 0 |  |  |
Disposition |  | 0 |  |  |  |
Impairment charges |  | 0 | 0 |  |  |
Accumulated impairment losses |  |  |  |  | 0 | 0
Goodwill, Total |  | 5,147 | 5,147 | 5,147 | 5,147 | 5,147
Tubular and Energy Services [Member] |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill, Beginning Balance |  | 28,417 | 38,846 |  |  |
Goodwill, Gross |  |  |  |  | 108,754 | 108,754
Acquisitions |  |  | 69,908 |  |  |
Foreign currency translation impact |  | 0 | 0 |  |  |
Disposition |  | 0 |  |  |  |
Impairment charges |  | (28,417) | (80,337) |  |  |
Accumulated impairment losses |  |  |  |  | (108,754) | (80,337)
Goodwill, Total |  | $ 28,417 | $ 38,846 | $ 38,846 | $ 0 | $ 28,417

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