NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Rewards Liability (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract]
Reward liability	$ 7.5	$ 7.1

Value of deferred revenue or cost to provide products or services, which is expected to be recognized in income or incurred within one year or the normal operating cycle, if longer, resulting from customer loyalty program. Excludes liability associated with frequent flier programs. Includes liability associated with customer loyalty programs for other businesses, for example, but is not limited to, hotels, supermarkets, credit card companies, automobile rental companies, and book sellers.

No definition available.

Name:	us-gaap_CustomerLoyaltyProgramLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant