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	Dec. 31, 2020	Dec. 31, 2019
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	$ 76,223	$ 57,723
12 Months or more Fair Value	2,968	2,829
Total Fair Value	79,191	60,552
Less than 12 months Unrealized Losses	10,861	5,638
12 Months or more Unrealized Losses	59	144
Total Unrealized Losses	10,920	5,782
Fixed maturities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	405	754
12 Months or more Fair Value	2,949	2,829
Total Fair Value	3,354	3,583
Less than 12 months Unrealized Losses	28	50
12 Months or more Unrealized Losses	44	144
Total Unrealized Losses	72	194
Fixed maturities | U.S. governmental securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value		291
12 Months or more Fair Value	990	942
Total Fair Value	990	1,233
Less than 12 months Unrealized Losses		4
12 Months or more Unrealized Losses		48
Total Unrealized Losses		52
Fixed maturities | Corporate debt securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value		463
12 Months or more Fair Value	1,959	1,887
Total Fair Value	1,959	2,350
Less than 12 months Unrealized Losses		46
12 Months or more Unrealized Losses	44	96
Total Unrealized Losses	44	142
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	600	2,856
Total Fair Value	600	2,856
Less than 12 months Unrealized Losses	9	38
Total Unrealized Losses	9	38
Mutual funds - equity securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	288	566
Total Fair Value	288	566
Less than 12 months Unrealized Losses	7	66
Total Unrealized Losses	7	66
Other investment funds
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	74,885	53,426
Total Fair Value	74,885	53,426
Less than 12 months Unrealized Losses	10,813	5,472
Total Unrealized Losses	10,813	5,472
Equity securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	45	121
12 Months or more Fair Value	19
Total Fair Value	64	121
Less than 12 months Unrealized Losses	4	12
12 Months or more Unrealized Losses	15
Total Unrealized Losses	$ 19	$ 12