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Accrued Expenses (Tables) | 9 Months Ended
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Sep. 30, 2011
Accrued Expenses | Accrued expenses consisted of the following at September 30, 2011 and December 31, 2010 (in thousands):
|  | September 30, 2011 |  |  | December 31, 2010 |
Salaries, wages, payroll taxes and benefits |  | $ | 37,425 |  |  | $ | 39,866 |
Workers’ compensation liability |  |  | 65,935 |  |  |  | 63,011 |
Property, sales, use and other taxes |  |  | 13,763 |  |  |  | 6,682 |
Insurance, other than workers’ compensation |  |  | 6,018 |  |  |  | 12,648 |
Accrued interest payable |  |  | 8,609 |  |  |  | 4,879 |
Deferred revenue – current |  |  | 7,229 |  |  |  | 10,220 |
2009 Performance Unit Awards |  |  | 4,563 |  |  |  | — |
Other |  |  | 8,759 |  |  |  | 10,009 |
|  | $ | 152,301 |  |  | $ | 147,315 |

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- Definition Tabular disclosure of the components of accrued liabilities. + Details
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Namespace Prefix: | us-gaap
Data Type: | nonnum:textBlockItemType
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