PERPETUAL CARE TRUSTS - Contractual Maturities of Debt Securities Held in Perpetual Care Trusts (Detail) - Variable Interest Entity, Primary Beneficiary - Perpetual care trusts - Fixed maturities - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investments Classified by Contractual Maturity Date [Line Items]
Less than 1 year		$ 430
1 year through 5 years	$ 471	559
More than 10 years	15	21
U.S. governmental securities
Investments Classified by Contractual Maturity Date [Line Items]
Less than 1 year		25
1 year through 5 years	1	6
More than 10 years	15	21
Corporate debt securities
Investments Classified by Contractual Maturity Date [Line Items]
1 year through 5 years	$ 470	553
Other Debt Securities
Investments Classified by Contractual Maturity Date [Line Items]
Less than 1 year		$ 405