Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Mar. 31, 2020	Jun. 30, 2019
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Annual Report	true
Document Transition Report	false
Entity Registrant Name	STONEMOR INC.
Entity Central Index Key	0001753886
Trading Symbol	STON
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		94,477,102
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-39172
Entity Tax Identification Number	80-0103152
Entity Address, Address Line One	3600 Horizon Boulevard
Entity Address, City or Town	Trevose
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19053
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 49.3
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, $0.01 par value per share
Security Exchange Name	NYSE
City Area Code	215
Local Phone Number	826-2800