Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets- Goodwill (Details)

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Goodwill and Intangible Assets- Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]    
Goodwill, Purchase Accounting Adjustments $ 641  
Goodwill [Roll Forward]    
Balance, December 31, 2013 53,074  
Currency effects (56)  
Balance, March 31, 2014 53,659  
Accumulated Goodwill Impairment (1,016) (1,016)
Decrease to the recorded fair value of certain acquired intangible assets (801)  
Deferred tax liabilities, goodwill and intangible Assets 160  
U.S. Regions
    
Goodwill [Roll Forward]    
Balance, December 31, 2013   24,759
Balance, March 31, 2014 24,759 24,759
Accumulated Goodwill Impairment 0 0
U.S. Federal
    
Goodwill [Roll Forward]    
Balance, December 31, 2013   3,375
Balance, March 31, 2014 3,375 3,375
Accumulated Goodwill Impairment 0 0
Canada
    
Goodwill [Roll Forward]    
Balance, December 31, 2013 4,124  
Currency effects (156)  
Balance, March 31, 2014 3,968  
Accumulated Goodwill Impairment (1,016) (1,016)
Small-Scale Infrastructure
    
Goodwill [Roll Forward]    
Balance, December 31, 2013 0  
Currency effects 0  
Balance, March 31, 2014 0  
Accumulated Goodwill Impairment 0 0
Other
    
Goodwill [Line Items]    
Goodwill, Purchase Accounting Adjustments (641) [1]  
Goodwill [Roll Forward]    
Balance, December 31, 2013 20,816  
Currency effects 100  
Balance, March 31, 2014 21,557  
Accumulated Goodwill Impairment $ 0 $ 0
[1] Fair value adjustment represents a purchase accounting adjustment to decrease the recorded fair value of certain acquired intangible assets totaling $801, net of a $160 deferred tax liability adjustment, related to the Company’s prior year acquisition of The Energy Services Partnership Limited and ESP Response Limited (together “ESP”).