MERCHANDISE TRUSTS - Contractual Maturities of Debt Securities Held in Merchandise Trusts (Detail) - Variable Interest Entity, Primary Beneficiary - Merchandise Trusts - Fixed maturities - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investments Classified by Contractual Maturity Date [Line Items]
Less than 1 year		$ 18,392
1 year through 5 years	$ 3,607	8,476
U.S. governmental securities
Investments Classified by Contractual Maturity Date [Line Items]
1 year through 5 years	1	1
Corporate debt securities
Investments Classified by Contractual Maturity Date [Line Items]
1 year through 5 years	$ 3,606	3,456
Other Debt Securities
Investments Classified by Contractual Maturity Date [Line Items]
Less than 1 year		18,392
1 year through 5 years		$ 5,019