GENERAL - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	May 11, 2021 USD ($)	Jun. 30, 2021 USD ($) Property State	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Property State Segment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cash and cash equivalents | $		$ 90,400		$ 90,400		$ 39,200
Restricted cash | $		16,600		$ 16,600		20,800
Investment income, contractual term				60 months
Debt instrument, variable rate				375.00%
Number of reportable segments | Segment				2
Accounts receivable average cancellation rate basis period				5 years
Lease renewal term description				Certain leases provide the Company with the option to renew for additional periods, with renewal terms that can extend the lease term for periods ranging from 1 to 30 years.
Income tax benefit | $		$ 9,736	$ 3,492	$ 11,412	$ 2,204
Operating tax rate before discrete items		21.60%	47.20%	22.20%	76.40%
Maximum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Liquid investments purchased with an original maturity				3 months
Product sales, payment term				60 months
Lease renewal term				30 years
Minimum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Lease renewal term				1 year
Coronavirus Disease2019 Pandemic
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cost related to COVID-19 safety protocols | $						$ 1,000
8.500% Senior Secured Notes due 2029
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Long-term debt, principal amount | $	$ 400,000
Long-term debt, interest rate	8.50%	8.50%		8.50%
Gross proceeds from the sale of the senior secured notes | $	$ 389,900
9.875% notes, due 2024
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Long-term debt, interest rate		9.875%		9.875%
11.500% notes, due 2024
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Long-term debt, interest rate		11.50%		11.50%
StoneMor Operating LLC
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Ownership percentage subsidiaries by the parent		100.00%		100.00%
Cemetery
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		30		30
Cemetery | Consolidated Properties
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		16		16
Cemetery | Unconsolidated Properties
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		14		14
US and Puerto Rico | Cemetery
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		301		301
Number of states | State		24		24
US and Puerto Rico | Cemetery | Wholly Owned Properties
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		271		271
US and Puerto Rico | Cemetery | Managed Properties
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		30		30
US and Puerto Rico | Funeral Home
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		70		70
Number of states | State		15		15
US and Puerto Rico | Funeral Home | Cemetery Property
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of operating locations		33		33