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Goodwill
12 Months Ended
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill

Our goodwill, all of which pertains to Rail North America and Rail International, was $94.6 million as of December 31, 2013 and $91.7 million as of December 31, 2012. In the fourth quarter of 2013, we performed a review for impairment of goodwill, and concluded that goodwill was not impaired. For 2013 and 2012, changes in the carrying amount of our goodwill resulted from changes in foreign currency exchange rates.