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Other Income (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 07, 2017 | Dec. 23, 2015 | Nov. 23, 2015 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Gain on Rail Segment patent sale |  |  |  |  | $ (500) | $ 0 | $ 0
Foreign currency losses (gains) |  |  |  |  | 804 | 12 | (1,616)
Remeasurement gain on equity method investment |  |  |  |  | 0 | 0 | (580)
Legal settlement gain |  |  |  | $ (460) | 0 | 0 | (460)
Other |  |  |  |  | (184) | (1,535) | (650)
Other income |  |  |  |  | (367) | (1,523) | (5,585)
TEW Plus LTD |  |  |  |  |  |  |
Remeasurement gain on equity method investment |  |  | $ (580) |  |  |  |
Percentage of voting interests acquired |  |  | 75.00% |  |  |  |
Asset Sale | Protective Coating Field Service |  |  |  |  |  |  |
(Gain) loss on sale of asset |  |  |  |  | (487) | 0 | 0
Proceeds from sales of asset | $ 1,200 |  |  |  |  |  |
Asset Sale | Tucson Arizona |  |  |  |  |  |  |
(Gain) loss on sale of asset |  | $ (2,279) |  |  | $ 0 | $ 0 | $ (2,279)
Proceeds from sales of asset |  | $ 2,750 |  |  |  |  |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30700-110894 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30690-110894 + Details
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