DEFERRED REVENUES AND COSTS - Schedule of Deferred Revenues and Related Costs (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Revenue From Contract With Customer [Abstract]
Deferred contract revenues	$ 846,363	$ 832,373
Deferred merchandise trust revenue	94,088	87,218
Deferred merchandise trust unrealized gains (losses)	45,593	29,573
Deferred revenues	986,044	949,164
Deferred selling and obtaining costs	$ 119,068	$ 116,900