PERPETUAL CARE TRUSTS - Aging of Unrealized Losses on Investments in Fixed Maturities and Equity Securities Held in Perpetual Care Trusts (Detail) - Variable Interest Entity, Primary Beneficiary - Perpetual care trusts - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	$ 55,191	$ 76,223
12 Months or more Fair Value	2,952	2,968
Total Fair Value	58,143	79,191
Less than 12 months Unrealized Losses	6,960	10,861
12 Months or more Unrealized Losses	3	59
Total Unrealized Losses	6,963	10,920
Fixed maturities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	1	405
12 Months or more Fair Value	2,949	2,949
Total Fair Value	2,950	3,354
Less than 12 months Unrealized Losses		28
12 Months or more Unrealized Losses		44
Total Unrealized Losses		72
Fixed maturities | U.S. governmental securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	1
12 Months or more Fair Value	990	990
Total Fair Value	991	990
Fixed maturities | Corporate debt securities
Investments, Unrealized Loss Position [Line Items]
12 Months or more Fair Value	1,959	1,959
Total Fair Value	1,959	1,959
12 Months or more Unrealized Losses		44
Total Unrealized Losses		44
Fixed maturities | Other Debt Securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value		405
Total Fair Value		405
Less than 12 months Unrealized Losses		28
Total Unrealized Losses		28
Mutual funds - debt securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	1,084	600
12 Months or more Fair Value	2
Total Fair Value	1,086	600
Less than 12 months Unrealized Losses	12	9
Total Unrealized Losses	12	9
Mutual funds - equity securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	214	288
12 Months or more Fair Value	1
Total Fair Value	215	288
Less than 12 months Unrealized Losses	1	7
12 Months or more Unrealized Losses	3
Total Unrealized Losses	4	7
Other investment funds
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	53,752	74,885
Total Fair Value	53,752	74,885
Less than 12 months Unrealized Losses	6,908	10,813
Total Unrealized Losses	6,908	10,813
Equity securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	140	45
12 Months or more Fair Value		19
Total Fair Value	140	64
Less than 12 months Unrealized Losses	39	4
12 Months or more Unrealized Losses		15
Total Unrealized Losses	$ 39	$ 19