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	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Fair Value, Assets held for sale	$ (4,518)	$ (31,689)
Cost, Excluding assets held for sale	303,438	336,902
Gross Unrealized Gains, Excluding assets held for sale	24,228	14,969
Gross Unrealized Losses, Excluding assets held for sale	(10,920)	(5,782)
Fair Value, Excluding assets held for sale	312,228	314,400
Short-term investments | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	21,217	50,358
Fair Value	21,217	50,358
Fixed maturities
Debt Securities, Available-for-sale [Line Items]
Cost	986	3,089
Gross Unrealized Gains	96	54
Gross Unrealized Losses	(72)	(194)
Fair Value	1,010	2,949
Fixed maturities | Level 2 | U.S. governmental securities
Debt Securities, Available-for-sale [Line Items]
Cost	48	1,069
Gross Unrealized Gains	4	32
Gross Unrealized Losses		(52)
Fair Value	52	1,049
Fixed maturities | Level 2 | Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Cost	505	2,020
Gross Unrealized Gains	92	22
Gross Unrealized Losses	(44)	(142)
Fair Value	553	1,900
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	2,386	49,963
Gross Unrealized Gains	62	1,439
Gross Unrealized Losses	(9)	(38)
Fair Value	2,439	51,364
Mutual funds - equity securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	9,240	16,698
Gross Unrealized Gains	1,244	1,617
Gross Unrealized Losses	(7)	(66)
Fair Value	10,477	18,249
Other investment funds
Debt Securities, Available-for-sale [Line Items]
Cost	247,845	186,355
Gross Unrealized Gains	21,952	10,526
Gross Unrealized Losses	(10,813)	(5,472)
Fair Value	258,984	191,409
Equity securities | Level 1
Debt Securities, Available-for-sale [Line Items]
Cost	21,748	30,423
Gross Unrealized Gains	873	1,333
Gross Unrealized Losses	(19)	(12)
Fair Value	22,602	31,744
Other invested assets | Level 2
Debt Securities, Available-for-sale [Line Items]
Cost	16	16
Gross Unrealized Gains	1
Fair Value	17	16
Total Investments
Debt Securities, Available-for-sale [Line Items]
Cost	303,438	336,902
Gross Unrealized Gains	24,228	14,969
Gross Unrealized Losses	(10,920)	(5,782)
Fair Value	$ 316,746	$ 346,089