DEFERRED REVENUES AND COSTS - Schedule of Deferred Revenue and Related Costs (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Deferred contract revenues	$ 832,373	$ 799,058
Deferred merchandise trust revenue	87,218	93,657
Deferred merchandise trust unrealized gains (losses)	29,573	7,274
Deferred revenues	949,164	899,989
Deferred selling and obtaining costs	$ 116,900	$ 110,684