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Accrued Payroll Costs - Components of Accrued Payroll Costs (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Accrued Payroll Costs [Abstract]    
Payroll and benefits $ 39,043 $ 43,797
Payroll taxes 2,832 3,062
Health insurance liabilities 2,968 3,417
Workers’ compensation liabilities 1,282 1,932
Total $ 46,125 $ 52,208