Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets- Goodwill (Details)

v3.5.0.2
Goodwill and Intangible Assets- Goodwill (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Goodwill [Roll Forward]    
Balance, December 31, 2015 $ 59,085  
Currency effects (724)  
Balance, September 30, 2016 58,361  
Accumulated Goodwill Impairment (1,016) $ (1,016)
Operating Segments | U.S. Regions    
Goodwill [Roll Forward]    
Balance, December 31, 2015 24,759  
Currency effects 0  
Balance, September 30, 2016 24,759  
Accumulated Goodwill Impairment 0 0
Operating Segments | U.S. Federal    
Goodwill [Roll Forward]    
Balance, December 31, 2015 3,375  
Currency effects 0  
Balance, September 30, 2016 3,375  
Accumulated Goodwill Impairment 0 0
Operating Segments | Canada    
Goodwill [Roll Forward]    
Balance, December 31, 2015 3,162  
Currency effects 175  
Balance, September 30, 2016 3,337  
Accumulated Goodwill Impairment (1,016) (1,016)
Operating Segments | Small-Scale Infrastructure    
Goodwill [Roll Forward]    
Balance, December 31, 2015 0  
Currency effects 0  
Balance, September 30, 2016 0  
Accumulated Goodwill Impairment 0 0
Operating Segments | Other    
Goodwill [Roll Forward]    
Balance, December 31, 2015 27,789  
Currency effects (899)  
Balance, September 30, 2016 26,890  
Accumulated Goodwill Impairment $ 0 $ 0