SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION - Schedule of Cash Flow, Supplemental Disclosures (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Accounts Receivable
Pre-need/at-need contract originations (sales on credit)	$ (100,915)	$ (88,719)
Cash receipts from sales on credit (post-origination)	84,710	72,539
Changes in accounts receivable, net of allowance	(16,205)	(16,180)
Deferrals:
Cash receipts from customer deposits at origination, net of refunds	136,668	115,824
Withdrawals of realized income from merchandise trusts during the period	10,460	7,406
Pre-need/at-need contract originations (sales on credit)	100,915	88,719
Undistributed merchandise trust investment earnings, net	28,787	5,377
Recognition:
Merchandise trust investment income, net withdrawn as of end of period	(9,593)	(6,629)
Recognized maturities of customer contracts collected as of end of period	(168,553)	(151,016)
Recognized maturities of customer contracts uncollected as of end of period	(21,166)	(20,443)
Changes in customer contract liabilities	$ 77,518	$ 39,238