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
 6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Goodwill [Roll Forward]    
Balance, December 31, 2015 $ 59,085  
Currency effects (470)  
Balance, June 30, 2016 58,615  
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, June 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, June 30, 2016 3,375  
Accumulated Goodwill Impairment 0 0
Operating Segments | Canada    
Goodwill [Roll Forward]    
Balance, December 31, 2015 3,162  
Currency effects 223  
Balance, June 30, 2016 3,385  
Accumulated Goodwill Impairment (1,016) (1,016)
Operating Segments | Small-Scale Infrastructure    
Goodwill [Roll Forward]    
Balance, December 31, 2015 0  
Currency effects 0  
Balance, June 30, 2016 0  
Accumulated Goodwill Impairment 0 0
Operating Segments | Other    
Goodwill [Roll Forward]    
Balance, December 31, 2015 27,789  
Currency effects (693)  
Balance, June 30, 2016 27,096  
Accumulated Goodwill Impairment $ 0 $ 0