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Summary of Accrued Expenses (Detail) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Payables And Accruals [Abstract] |  |
Salaries, wages, payroll taxes and benefits | $ 34,699 | $ 21,138
Workers' compensation liability | 81,653 | 67,775
Property, sales, use and other taxes | 29,123 | 6,766
Insurance, other than workers' compensation | 9,248 | 9,566
Accrued interest payable | 9,408 | 6,740
Accrued merger and integration | 25,206 |
Other | 28,184 | 27,163
Accrued expenses | $ 217,521 | $ 139,148

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