| Summary of Intangible Assets | 
        
The following is a summary of intangible assets as of June 30, 2014 and December 31, 2013:  
  
| 
   
 | 
    
 | 
 Customer Relationships 
 | 
   
 | 
   
 | 
 Other Intangible Assets 
 | 
   
 | 
   
 | 
 Total 
 | 
   
 | 
 
| 
 Cost 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2014 
 | 
    
 | 
 $ 
 | 
 17,560 
 | 
    
 | 
   
 | 
 $ 
 | 
 1,663 
 | 
    
 | 
   
 | 
 $ 
 | 
 19,223 
 | 
    
 | 
 
| 
 Balance, June 30, 2014 
 | 
    
 | 
   
 | 
 17,560 
 | 
   
 | 
   
 | 
   
 | 
 1,663 
 | 
   
 | 
   
 | 
   
 | 
 19,223 
 | 
    
 | 
 
| 
 Useful lives 
 | 
    
 | 
   
 | 
 10-20 years 
 | 
   
 | 
   
 | 
   
 | 
 3-5 years 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Accumulated amortization 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2014 
 | 
    
 | 
   
 | 
 (5,410 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,224 
 | 
 ) 
 | 
   
 | 
   
 | 
 (6,634 
 | 
 ) 
 | 
 
| 
 Amortization expense 
 | 
    
 | 
   
 | 
 (630 
 | 
 ) 
 | 
   
 | 
   
 | 
 (89 
 | 
 ) 
 | 
   
 | 
   
 | 
 (719 
 | 
 ) 
 | 
 
| 
 Balance, June 30, 2014 
 | 
    
 | 
   
 | 
 (6,040 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,313 
 | 
 ) 
 | 
   
 | 
   
 | 
 (7,353 
 | 
 ) 
 | 
 
| 
 Net book value 
 | 
    
 | 
 $ 
 | 
 11,520 
 | 
   
 | 
   
 | 
 $ 
 | 
 350 
 | 
   
 | 
   
 | 
 $ 
 | 
 11,870 
 | 
    
 | 
 
| 
 Cost 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2013 
 | 
    
 | 
 $ 
 | 
 15,910 
 | 
    
 | 
   
 | 
 $ 
 | 
 1,566 
 | 
    
 | 
   
 | 
 $ 
 | 
 17,476 
 | 
    
 | 
 
| 
 Acquisition of certain assets of Ten-Sixty 
 | 
    
 | 
   
 | 
 1,650 
 | 
    
 | 
   
 | 
   
 | 
 97 
 | 
    
 | 
   
 | 
   
 | 
 1,747 
 | 
    
 | 
 
| 
 Balance, December 31, 2013 
 | 
    
 | 
   
 | 
 17,560 
 | 
    
 | 
   
 | 
   
 | 
 1,663 
 | 
    
 | 
   
 | 
   
 | 
 19,223 
 | 
    
 | 
 
| 
 Useful lives 
 | 
    
 | 
   
 | 
 10-20 years 
 | 
    
 | 
   
 | 
   
 | 
 3-5 years 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Accumulated amortization 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2013 
 | 
    
 | 
   
 | 
 (4,238 
 | 
 ) 
 | 
   
 | 
   
 | 
 (875 
 | 
 ) 
 | 
   
 | 
   
 | 
 (5,113 
 | 
 ) 
 | 
 
| 
 Amortization expense 
 | 
    
 | 
   
 | 
 (1,172 
 | 
 ) 
 | 
   
 | 
   
 | 
 (349 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,521 
 | 
 ) 
 | 
 
| 
 Balance, December 31, 2013 
 | 
   
 | 
   
 | 
 (5,410 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,224 
 | 
 ) 
 | 
   
 | 
   
 | 
 (6,634 
 | 
 ) 
 | 
 
| 
 Net Book Value 
 | 
    
 | 
  $ 
 | 
 12,150 
 | 
   
 | 
   
 | 
  $ 
 | 
 439 
 | 
   
 | 
   
 | 
  $ 
 | 
 12,589 
 | 
   
 | 
 
 
 
  
 
 |