PERPETUAL CARE TRUSTS - Cost and Market Value Associated with Assets Held in Perpetual Care Trusts (Detail) - Variable Interest Entity, Primary Beneficiary - Perpetual care trusts - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fair Value, Assets held for sale		$ (4,518)
Fair Value, Excluding assets held for sale		312,228
Short-term investments | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	$ 19,971	21,217
Fair Value	19,971	21,217
Fixed maturities
Debt Securities, Available-for-sale [Line Items]
Cost	380	986
Gross Unrealized Gains	112	96
Gross Unrealized Losses		(72)
Fair Value	492	1,010
Fixed maturities | Level 2 | U.S. governmental securities
Debt Securities, Available-for-sale [Line Items]
Cost	15	48
Gross Unrealized Gains	2	4
Fair Value	17	52
Fixed maturities | Level 2 | Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Cost	365	505
Gross Unrealized Gains	110	92
Gross Unrealized Losses		(44)
Fair Value	475	553
Fixed maturities | Level 2 | Other Debt Securities
Debt Securities, Available-for-sale [Line Items]
Cost		433
Gross Unrealized Losses		(28)
Fair Value		405
Mutual funds - debt securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	1,982	2,386
Gross Unrealized Gains	43	62
Gross Unrealized Losses	(12)	(9)
Fair Value	2,013	2,439
Mutual funds - equity securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	9,846	9,240
Gross Unrealized Gains	3,788	1,244
Gross Unrealized Losses	(4)	(7)
Fair Value	13,630	10,477
Other investment funds
Debt Securities, Available-for-sale [Line Items]
Cost	257,247	247,845
Gross Unrealized Gains	21,205	21,952
Gross Unrealized Losses	(6,908)	(10,813)
Fair Value	271,544	258,984
Equity securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	13,824	21,748
Gross Unrealized Gains	5,513	873
Gross Unrealized Losses	(39)	(19)
Fair Value	19,298	22,602
Other invested assets | Level 2
Debt Securities, Available-for-sale [Line Items]
Cost	9	16
Gross Unrealized Gains	1	1
Fair Value	10	17
Total Investments
Debt Securities, Available-for-sale [Line Items]
Cost	303,259	303,438
Gross Unrealized Gains	30,662	24,228
Gross Unrealized Losses	(6,963)	(10,920)
Fair Value	$ 326,958	$ 316,746