OTHER ACCRUED LIABILITIES (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Payroll and other compensation expenses	$ 40,988	$ 38,214
Insurance accruals	15,799	13,896
Property, sales and other non-income related taxes	6,483	5,599
Lease commitments	1,616	2,119
Deferred revenue	6,102	3,433
Accrued commission	1,473	1,355
Accrued interest	5,950	603
Volume discount	1,545	1,067
Contingent consideration	1,246	2,103
Professional fees	1,098	1,530
Other	10,172	9,985
Total	$ 92,472	$ 79,904