DEFERRED REVENUES AND COSTS - Schedule of Customer Contract Liabilities, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Customer contract liabilities, gross	$ 973,444	$ 921,488
Amounts due from customers for unfulfilled performance obligations on cancellable pre-need contracts	(24,280)	(21,499)
Customer contract liabilities, net	$ 949,164	$ 899,989