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Accrued Expenses (Tables) | 9 Months Ended
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Sep. 30, 2018
Payables And Accruals [Abstract] |
Summary of Accrued Expenses | Accrued expenses consisted of the following at September 30, 2018 and December 31, 2017 (in thousands):
| September 30, |  |  | December 31, |
| 2018 |  |  | 2017 |
Salaries, wages, payroll taxes and benefits | $ | 65,617 |  |  | $ | 50,443 |
Workers' compensation liability |  | 82,640 |  |  |  | 80,751 |
Property, sales, use and other taxes |  | 33,148 |  |  |  | 29,332 |
Insurance, other than workers' compensation |  | 12,212 |  |  |  | 10,816 |
Accrued interest payable |  | 17,196 |  |  |  | 7,558 |
Accrued merger and integration |  | 3,635 |  |  |  | 16,101 |
Other |  | 41,907 |  |  |  | 31,628 |
Total | $ | 256,355 |  |  | $ | 226,629 |

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