DEFERRED REVENUES AND COSTS - Schedule of Deferred Revenues and Related Costs (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Deferred contract revenues	$ 852,570	$ 832,373
Deferred merchandise trust revenue	100,428	87,218
Deferred merchandise trust unrealized gains (losses)	60,655	29,573
Deferred revenues	1,013,653	949,164
Deferred selling and obtaining costs	$ 120,229	$ 116,900