SUPPLEMENTAL CONSOLIDATED CASH FLOW INFORMATION - Schedule of Cash Flow, Supplemental Disclosures (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts Receivable
Pre-need/at-need contract originations (sales on credit)	$ (34,176)	$ (25,457)
Cash receipts from sales on credit (post-origination)	27,333	23,862
Changes in accounts receivable, net of allowance	(6,843)	(1,595)
Deferrals:
Cash receipts from customer deposits at origination, net of refunds	44,683	35,586
Withdrawals of realized income from merchandise trusts during the period	3,220	2,684
Pre-need/at-need contract originations (sales on credit)	34,176	25,457
Undistributed merchandise trust investment earnings, net	4,881	(1,595)
Recognition:
Merchandise trust investment income, net withdrawn as of end of period	(2,149)	(2,107)
Recognized maturities of customer contracts collected as of end of period	(52,862)	(45,989)
Recognized maturities of customer contracts uncollected as of end of period	(9,351)	(7,602)
Changes in customer contract liabilities	$ 22,598	$ 6,434