Summary of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Payables And Accruals [Abstract]
Salaries, wages, payroll taxes and benefits	$ 37,627	$ 57,615
Workers’ compensation liability	70,847	81,112
Property, sales, use and other taxes	10,666	22,404
Insurance, other than workers’ compensation	8,462	9,218
Accrued interest payable	11,325	12,021
Accrued restructuring expenses	14,310
Other	21,767	37,480
Accrued liabilities	$ 175,004	$ 219,850