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Summary of Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Salaries, wages, payroll taxes and benefits $ 29,058 $ 57,615
Workers' compensation liability 73,357 81,112
Property, sales, use and other taxes 25,400 22,404
Insurance, other than workers' compensation 7,924 9,218
Accrued interest payable 11,650 12,021
Accrued restructuring expenses 6,311  
Other 27,860 37,480
Accrued liabilities $ 181,560 $ 219,850