ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Accrued Expenses) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accrued Liabilities, Current [Abstract]
Accrued compensation	$ 118,479	$ 108,268
Accrued commissions	7,769	6,296
Accrued interest	8,944	9,894
Accrued insurance	6,951	7,015
Other Accrued Liabilities, Current	24,811	18,933
Accrued expenses	$ 166,954	$ 150,406