ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Accrued Expenses) (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Accrued compensation	$ 96,228	$ 119,293
Accrued commissions	6,050	6,678
Accrued interest	13,327	8,982
Accrued insurance	7,215	7,550
Accrued other liabilities	17,380	22,241
Accrued expenses	$ 140,200	$ 164,744