COMMITMENTS AND CONTINGENCIES - Additional Information (Detail)						1 Months Ended	9 Months Ended
	Oct. 07, 2021 USD ($) Location	Aug. 09, 2021 Location	Aug. 01, 2021 Location	Jul. 01, 2021 Location	Apr. 02, 2020 USD ($)	Dec. 31, 2021 Location	Sep. 30, 2021 USD ($) Location
Commitments And Contingencies [Line Items]
Agreement termination description							The initial term of the Agreement is through December 31, 2021 and it automatically renews for an unlimited number of one-year terms thereafter, provided that either party may terminate the Agreement on 90 days’ prior written notice. The Agreement also includes customary confidentiality and indemnification provisions.
Second Quarter Twenty Fourteen Acquisition
Commitments And Contingencies [Line Items]
Aggregate fixed rent payment to landlord							$ 36,000,000.0
Deferred fixed rent							$ 6,000,000.0
Second Quarter Twenty Fourteen Acquisition | Minimum
Commitments And Contingencies [Line Items]
Fixed rent for lease term deferred							6 years
Second Quarter Twenty Fourteen Acquisition | Maximum
Commitments And Contingencies [Line Items]
Fixed rent for lease term deferred							11 years
Master Services Agreement
Commitments And Contingencies [Line Items]
Agreement termination description					Each party has the right to terminate the MSAs at any time on six months’ prior written notice, provided that if we terminate the MSAs without cause, we will be obligated to pay Moon an equipment credit fee in the amount of $1.0 million for each year remaining in the term, prorated for the portion of the year in which any such termination occurs.
Master Services Agreement | Cemetery
Commitments And Contingencies [Line Items]
Aggregate amount of cost paid on behalf of Moon Landscaping, Inc							$ 6,000,000.0
Master Services Agreement | Moon Landscaping, Inc.
Commitments And Contingencies [Line Items]
Agreement without cause termination equipment credit fee payable					$ 1,000,000.0
Number of locations in outsource rights taken back for grounds and maintenance services | Location		111	22	81			214
Aggregate percentage of locations in outsource rights taken back for grounds and maintenance services		61.00%
Master Services Agreement | Moon Landscaping, Inc. | Scenario, Forecast
Commitments And Contingencies [Line Items]
Number of locations in outsource rights taken back for grounds and maintenance services | Location						53
Master Services Agreement | Moon Landscaping, Inc. | Subsequent Event
Commitments And Contingencies [Line Items]
Number of locations in outsource rights taken back for grounds and maintenance services | Location	53
Aggregate amount payable write off against post bankruptcy filing amount	$ 42,500
Outsource rights taken back for grounds and maintenance services exercise period	60 days
Master Services Agreement | Moon Landscaping, Inc. | Minimum | Subsequent Event
Commitments And Contingencies [Line Items]
Aggregate amount receivable prior to bankruptcy filing	$ 5,100,000
Aggregate amount receivable after bankruptcy filing	$ 572,605