| Summary of Intangible Assets | 
The following is a summary of intangible assets as of March 31, 2018 and December 31, 2017:  
  
| 
   
 | 
   
 | 
 Customer Relationships 
 | 
   
 | 
   
 | 
 Other Intangible Assets 
 | 
   
 | 
   
 | 
 Total 
 | 
   
 | 
 
| 
 Cost 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2018 
 | 
    
 | 
 $ 
 | 
 22,560 
 | 
    
 | 
   
 | 
 $ 
 | 
 2,467 
 | 
    
 | 
   
 | 
 $ 
 | 
 25,027 
 | 
    
 | 
 
| 
 Balance, March 31, 2018 
 | 
    
 | 
   
 | 
 22,560 
 | 
   
 | 
   
 | 
   
 | 
 2,467 
 | 
   
 | 
   
 | 
   
 | 
 25,027 
 | 
    
 | 
 
| 
 Useful lives 
 | 
    
 | 
   
 | 
 10-20 years 
 | 
   
 | 
   
 | 
   
 | 
 3-5 years 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Accumulated amortization 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2018 
 | 
    
 | 
   
 | 
 (11,367 
 | 
 ) 
 | 
   
 | 
   
 | 
 (2,082 
 | 
 ) 
 | 
   
 | 
   
 | 
 (13,449 
 | 
 ) 
 | 
 
| 
 Amortization expense 
 | 
    
 | 
   
 | 
 (380 
 | 
 ) 
 | 
   
 | 
   
 | 
 (45 
 | 
 ) 
 | 
   
 | 
   
 | 
 (425 
 | 
 ) 
 | 
 
| 
 Balance, March 31, 2018 
 | 
    
 | 
   
 | 
 (11,747 
 | 
 ) 
 | 
   
 | 
   
 | 
 (2,127 
 | 
 ) 
 | 
   
 | 
   
 | 
 (13,874 
 | 
 ) 
 | 
 
| 
 Net book value 
 | 
    
 | 
 $ 
 | 
 10,813 
 | 
   
 | 
   
 | 
 $ 
 | 
 340 
 | 
   
 | 
   
 | 
 $ 
 | 
 11,153 
 | 
    
 | 
 
| 
 Cost 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2017 
 | 
    
 | 
 $ 
 | 
 22,560 
 | 
    
 | 
   
 | 
 $ 
 | 
 2,467 
 | 
    
 | 
   
 | 
 $ 
 | 
 25,027 
 | 
    
 | 
 
| 
 Balance, December 31, 2017 
 | 
    
 | 
   
 | 
 22,560 
 | 
    
 | 
   
 | 
   
 | 
 2,467 
 | 
    
 | 
   
 | 
   
 | 
 25,027 
 | 
    
 | 
 
| 
 Useful lives 
 | 
    
 | 
   
 | 
 10-20 years 
 | 
    
 | 
   
 | 
   
 | 
 3-5 years 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Accumulated amortization 
 | 
    
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Balance, January 1, 2017 
 | 
    
 | 
   
 | 
 (9,721 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,902 
 | 
 ) 
 | 
   
 | 
   
 | 
 (11,623 
 | 
 ) 
 | 
 
| 
 Amortization expense 
 | 
    
 | 
   
 | 
 (1,646 
 | 
 ) 
 | 
   
 | 
   
 | 
 (180 
 | 
 ) 
 | 
   
 | 
   
 | 
 (1,826 
 | 
 ) 
 | 
 
| 
 Balance, December 31, 2017 
 | 
   
 | 
   
 | 
 (11,367 
 | 
 ) 
 | 
   
 | 
   
 | 
 (2,082 
 | 
 ) 
 | 
   
 | 
   
 | 
 (13,449 
 | 
 ) 
 | 
 
| 
 Net Book Value 
 | 
    
 | 
 $ 
 | 
 11,193 
 | 
   
 | 
   
 | 
 $ 
 | 
 385 
 | 
   
 | 
   
 | 
 $ 
 | 
 11,578 
 | 
   
 | 
 
 
 
  
 
 | 
| Schedule of Future Amortization Related to Intangible Assets | 
Amortization related to the Company’s finite life intangible assets is scheduled to be expensed over the next five years and thereafter as follows:  
  
| 
 2018 (remainder of) 
 | 
    
 | 
 $ 
 | 
 1,260 
 | 
    
 | 
 
| 
 2019 
 | 
    
 | 
   
 | 
 1,390 
 | 
    
 | 
 
| 
 2020 
 | 
    
 | 
   
 | 
 1,299 
 | 
    
 | 
 
| 
 2021 
 | 
    
 | 
   
 | 
 1,196 
 | 
    
 | 
 
| 
 2022 
 | 
    
 | 
   
 | 
 1,142 
 | 
   
 | 
 
| 
 Thereafter 
 | 
    
 | 
   
 | 
 4,866 
 | 
   
 | 
 
| 
 Total 
 | 
    
 | 
 $ 
 | 
 11,153 
 | 
    
 | 
 
 
 
  
 
 |