Accrued liabilities consisted of the following at September 30, 2016 and December 31, 2015: | | | | | | | | | | September 30, 2016 | | December 31, 2015 | Accrued payroll and employee benefits | $ | 1,402 |
| | $ | 5,839 |
| Accrued insurance | 4,546 |
| | 5,896 |
| Accrued legal and environmental costs | 1,595 |
| | 1,531 |
| Accrued taxes (Note 11) | 2,629 |
| | 1,514 |
| Accrued interest (Note 8) | 2,040 |
| | 8,516 |
| Accrued operating costs | 4,231 |
| | 4,233 |
| Accrued other | 1,838 |
| | 2,314 |
| Total accrued liabilities | $ | 18,281 |
| | $ | 29,843 |
|
|