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Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2012
Accrued Expenses | Accrued expenses consisted of the following at December 31, 2012 and 2011 (in thousands):
|  | 2012 |  |  | 2011 |
Salaries, wages, payroll taxes and benefits |  | $ | 55,430 |  |  | $ | 58,692 |
Workers’ compensation liability |  |  | 68,441 |  |  |  | 66,121 |
Property, sales, use and other taxes |  |  | 9,749 |  |  |  | 11,850 |
Insurance, other than workers’ compensation |  |  | 10,419 |  |  |  | 6,012 |
Accrued interest payable |  |  | 7,664 |  |  |  | 4,937 |
Deferred revenue — current |  |  | 1,523 |  |  |  | 7,229 |
2009 Performance Unit Awards |  |  | — |  |  |  | 3,640 |
Other |  |  | 5,406 |  |  |  | 6,148 |
|  | $ | 158,632 |  |  | $ | 164,629 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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