| Document and Entity Information | Sep. 22, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001753886 |
| Document Type | 8-K |
| Document Period End Date | Sep. 22, 2021 |
| Entity Registrant Name | STONEMOR INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39172 |
| Entity Tax Identification Number | 80-0103152 |
| Entity Address, Address Line One | 3331 Street Road |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | Bensalem |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19020 |
| City Area Code | (215) |
| Local Phone Number | 826-2800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value per share |
| Trading Symbol | STON |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
