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Accrued Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2014
Accrued Liabilities [Abstract] |
Components of Accrued Liabilities | The components of accrued liabilities are as follows (in thousands):
| June 30, 2014 |  | December 31, 2013
Compensation and benefits | $ | 126,470 |  |  | $ | 130,455 |
Medical insurance and workers’ compensation | 25,143 |  |  | 26,399 |
Franchise, property, sales and use taxes | 21,884 |  |  | 20,232 |
Customer volume discounts and rebates | 11,268 |  |  | 11,436 |
Environmental liabilities and asset retirement obligations | 7,465 |  |  | 7,812 |
Severance | 3,315 |  |  | 8,172 |
Legal contingencies | 905 |  |  | 1,000 |
Other | 10,864 |  |  | 8,552 |
Total | $ | 207,314 |  |  | $ | 214,058 |

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