MERCHANDISE TRUSTS - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($) Security	Dec. 31, 2021 USD ($)
West Virginia Trust Receivable
Schedule Of Available For Sale Securities [Line Items]
Trust assets, fair value	$ 9,400,000		$ 9,400,000		$ 10,300,000
Merchandise Trusts
Schedule Of Available For Sale Securities [Line Items]
Percentage of VIE for cancellable state	47.60%		47.60%
Impairments	$ 0	$ 0	$ 0	$ 0
Merchandise Trusts | Variable Interest Entity, Primary Beneficiary
Schedule Of Available For Sale Securities [Line Items]
Trust assets, fair value	604,760,000		604,760,000		567,853,000
Purchases of available for sale securities			39,800,000	36,600,000
Sales, maturities and paydowns of available for sale securities			14,000,000.0	32,600,000
Other than temporary impairments loss				$ 136,000
Merchandise Trusts | Variable Interest Entity, Primary Beneficiary | Other Than Temporarily Impaired Securities
Schedule Of Available For Sale Securities [Line Items]
Number of securities that incurred other than temporary impairment losses | Security				6
Trust assets, cost				$ 300,000
Trust assets, fair value				200,000
Other than temporary impairments loss				$ 100,000
Merchandise Trusts | West Virginia Trust Receivable | Variable Interest Entity, Primary Beneficiary
Schedule Of Available For Sale Securities [Line Items]
Trust assets, fair value	$ 9,374,000		$ 9,374,000		$ 10,292,000