| Summary of Intangible Assets | 
The following is a summary of intangible assets as of June 30, 2014 and December 31, 2013:    
|   |    | CustomerRelationships
 |   |   | OtherIntangible
 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 |   |    |