XML 63 R50.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Salaries, wages, payroll taxes and benefits $ 42,951 $ 50,443
Workers' compensation liability 82,789 80,751
Property, sales, use and other taxes 28,837 29,332
Insurance, other than workers' compensation 13,765 10,816
Accrued interest payable 17,003 7,558
Accrued merger and integration 3,874 16,101
Other 40,632 31,628
Accrued expenses $ 229,851 $ 226,629