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ACCRUED EXPENSES (Tables) | 12 Months Ended
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Dec. 31, 2013
Accrued Liabilities, Current [Abstract] |
Schedule of accrued expenses |
| December 31
| 2013 |  | 2012
| (in thousands)
Accrued compensation | $ | 22,734 |  |  | $ | 15,841 |
Accrued vacation pay | 36,246 |  |  | 40,473 |
Taxes other than income | 7,418 |  |  | 7,366 |
Workers’ compensation, third‑party casualty, and loss and damage claims reserves | 92,166 |  |  | 86,969 |
Other | 15,058 |  |  | 8,019 |
| $ | 173,622 |  |  | $ | 158,668 |

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