| Summary of Intangible Assets | 
The following is a summary of intangible assets as of December 31, 2016 and December 31, 2015:  
  
| 
   
 | 
    
 | 
 Customer Relationships 
 | 
   
 | 
   
 | 
 Other Intangible Assets 
 | 
   
 | 
   
 | 
 Total 
 | 
   
 | 
 
| 
 Cost 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2016 
 | 
    
 | 
 $ 
 | 
 22,560 
 | 
    
 | 
   
 | 
 $ 
 | 
 2,467 
 | 
    
 | 
   
 | 
 $ 
 | 
 25,027 
 | 
    
 | 
 
| 
 Balance, December 31, 2016 
 | 
    
 | 
   
 | 
 22,560 
 | 
   
 | 
   
 | 
   
 | 
 2,467 
 | 
   
 | 
   
 | 
   
 | 
 25,027 
 | 
    
 | 
 
| 
 Useful lives 
 | 
    
 | 
   
 | 
 10-20 years 
 | 
    
 | 
   
 | 
   
 | 
 3-5 years 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Accumulated amortization 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2016 
 | 
    
 | 
   
 | 
 (8,062 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,634 
 | 
 ) 
 | 
   
 | 
   
 | 
 (9,696 
 | 
 ) 
 | 
 
| 
 Amortization expense 
 | 
    
 | 
   
 | 
 (1,659 
 | 
 ) 
 | 
   
 | 
   
 | 
 (268 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,927 
 | 
 ) 
 | 
 
| 
 Balance, December 31, 2016 
 | 
    
 | 
   
 | 
 (9,721 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,902 
 | 
 ) 
 | 
   
 | 
   
 | 
 (11,623 
 | 
 ) 
 | 
 
| 
 Net book value 
 | 
    
 | 
 $ 
 | 
 12,839 
 | 
    
 | 
   
 | 
 $ 
 | 
 565 
 | 
    
 | 
   
 | 
 $ 
 | 
 13,404 
 | 
    
 | 
 
| 
   
Cost 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2015 
 | 
    
 | 
 $ 
 | 
 17,560 
 | 
    
 | 
   
 | 
 $ 
 | 
 1,663 
 | 
    
 | 
   
 | 
 $ 
 | 
 19,223 
 | 
    
 | 
 
| 
 Acquisition of certain assets of Jamison  
 | 
   
 | 
   
 | 
 5,000 
 | 
   
 | 
   
 | 
   
 | 
 804 
 | 
   
 | 
   
 | 
   
 | 
 5,804 
 | 
   
 | 
 
| 
 Balance, December 31, 2015 
 | 
    
 | 
   
 | 
 22,560 
 | 
    
 | 
   
 | 
   
 | 
 2,467 
 | 
    
 | 
   
 | 
   
 | 
 25,027 
 | 
    
 | 
 
| 
 Useful lives 
 | 
    
 | 
   
 | 
 10-20 years 
 | 
    
 | 
   
 | 
   
 | 
 3-5 years 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Accumulated amortization 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2015 
 | 
    
 | 
   
 | 
 (6,627 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,429 
 | 
 ) 
 | 
   
 | 
   
 | 
 (8,056 
 | 
 ) 
 | 
 
| 
 Amortization expense 
 | 
    
 | 
   
 | 
 (1,435 
 | 
 ) 
 | 
   
 | 
   
 | 
 (205 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,640 
 | 
 ) 
 | 
 
| 
 Balance, December 31, 2015 
 | 
    
 | 
   
 | 
 (8,062 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,634 
 | 
 ) 
 | 
   
 | 
   
 | 
 (9,696 
 | 
 ) 
 | 
 
| 
 Net book value 
 | 
    
 | 
 $ 
 | 
 14,498 
 | 
    
 | 
   
 | 
 $ 
 | 
 833 
 | 
    
 | 
   
 | 
 $ 
 | 
 15,331 
 | 
    
 | 
 
 
 
  
 
 |